Bitcoin Bull and Bear Markets

With Bitcoin hovering just several percent above the low set in June 2022, let’s have a look at the bull and bear markets that it underwent since 2010. There were 4 bull markets and 4 bear markets, as presented in the chart below.

Cycle 1 lasted between 2010 and 2012, cycle 2 between 2012 and 2015, while cycle 3 from 2015 until 2018. Cycle 4 started in Dec 2018 and one important question is whether it has ended already or not yet. In other words, will the June ‘22 low of 19,018 BTC/USD (on a closing basis) hold or will we experience new lows. We know the peak of cycle 4 is behind us, but we do not know, if we’ve seen the bottom. In order to have a better understanding of each cycle, let’s look at the data:

Maturation of bitcoin as an asset class seems to have brought, with each cycle, the following:
– lower annual returns
– lower volatility
– lower Sharpe ratio

Cycle 2 had a longer duration than cycle 1 and, in turn, cycle 3 has been longer than cycle 2. While the bull phase of cycle 4 was about as long as bull market of cycle 3 (1059 days vs. 1066 days), the bear market has been much shorter – just 222 days vs. 364 days. Also, the drawdown of cycle 4 so far has been 72%, while in the past 2 cycles the maximum drawdowns have been 82% and 83%. Now, if the volatility of an asset class decreases, one could plausibly expect lower drawdowns. Unfortunately, bitcoin’s volatility in cycle 4 has been more or less the same as in cycle 3: 74% vs. 73% on the annual basis. Coupled with lower annual returns (66% vs. 104%) this resulted in lower Sharpe ratio. The unfortunate consequence here is that there is a potential for even higher drawdown in cycle 4 when compared to cycle 3. If we assume that a bear market results in a 2 standard deviation move to the downside, the expected drawdown for cycle 4 (annual return of 66% and volatility of 73%) is, unfortunately, 86%. That translates to a bottom of about 9460, or -53% from current prices of ~20k USD/BTC. Ouch! Of course, this does not need to happen, as there’s no rule that a bear market “needs” to reach 2 standard deviations below the trend. If drawdown of cycle 4 matches those of cycle 2 and 3, we could see the trough of 10800-11200, still a ~45% drop form ~20k BTC/USD. Another way to get to this number is to look at the ratio of peaks and ratio of bottoms. The peak of cycle 4 (67 570 BTC/USD) was 3.47 times higher than peak of cycle 3 (19 500 BTC/USD). The expected bottom could then be 3.47*3237 or about 11200 BTC/USD.

Comparing current situation to previous market cycles is obviously an just one exercise to establish a baseline scenario. Perhaps the drawdown will be lower than expected due to more mature market and higher institutional ownership of cryptos. Perhaps it will be deeper, because we have substantial tightening from the FED and rising real long term interest rates. I’m just thinking that the short duration of current bear market, just 7 months, compared to 12-13 months in the previous two cycles, and still a relatively low drawdown of 72% vs. expected 80-85% (I know how this sounds!), makes it plausible that more pain is to be expected in the crypto world in the coming months.

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The Moneyness of Fiat, Gold, and Crypto

I’m aware that I’m using the term “moneyness” outside the typical meaning of the word. It usually describes the likelihood that a financial option can be exercised and earn money, rather than expire worthless. The measure can vary between 0% and 100%. I like the word “moneyness”, so I decided to repurpose it for a slightly different use. The intended meaning of the statement: “The Moneyness of Crypto” is: to what extent cryptos are or could be considered money? 0%? 100%? Or somewhere in between?

Amber, beads, beaver pelts, bottle caps, bronze ingots, candy, cigarettes, cocoa beans, copper, cowry shells, cows, fish, gold, knives, lead ingots, meteorite iron, obsidian, parmesan cheese, potato mashers, rum, salt, silver, squirrel pelts, stone wheels, tea bricks, whale teeth.

The list looks like a zoo of things that have nothing to do with one another. An yet – all these things have been used as money in the past. So, what is money? Money can best be described by either its characteristics or economic functions it serves. The characteristics of money are: durability, homogeneity/uniformity, divisibility, limited supply, recognizability/acceptability and portability. The economic functions of money are: a unit of account, a medium of exchange, and a store of value. The analysis is divided into two parts. This essay deals with the characteristics of money, while part 2 with its economic functions.

I’ll attempt to score three types of money: the money issued by governments (often called the “fiat” money), precious metals and cryptos on a scale of 0-10 in these areas. This is not a systematic review, as it is nearly impossible to consider the details of all state-issued monies, all cryptos, all potential uses or all transaction methods. The scoring system is also pretty subjective, so I’m sure the reader would score some of them differently, even given the data and perspective provided in these essays.

The government-issued or fiat money is a system consisting of at least three forms of money: coinage, paper money and electronic money. Therefore, even within one type of money there will be considerable difference of characteristics and functionalities. Consider, for example, the portability of coins vs. wire transfer for intercontinental transaction. Gold and silver are more uniform, but there are still some differences depending on whether we’re talking raw metal, coins, retail bars and ‘Good Delivery’ bars. Concerning cryptos, at the time of writing coinmarketcap.com lists 20,597 cryptocurrencies. They vary considerably, and it would be impractical to analyse even a small subset of them. I have concentrated on the main ones – Bitcoin (BTC), Ethereum (ETH) as well as several smaller ones that enable much higher transaction speed and throughput.

PART 1 – THE CHARACTERISTICS OF MONEY
Let’s start with a summary table of how well a given type of money (fiat, precious metals, cryptos) fulfils the required characteristics. A detailed discussion follows.

TABLE 1. SUMMARY OF SCORES FOR DIFFERENT TYPES OF MONEY BY INDIVIDUAL CHARACTERISTICS

 State issued (fiat) moneyGold and silverCryptos
    
Durability6-108-109-10
Uniformity8-108-1010
Divisibility8-108-1010
Limited supply0-88-98-10
Recognizability1053
Portability5-105-108-10


DURABILITY
The durability of fiat money depends on its form. Coins are rather durable, US Mint provides a 30-year life time while UK’s Royal Mint states that coins can stay in circulation for 40+ years. I assign a score of 9 to durability of coins.

We tend to call the banknotes “paper money”, but nowadays they are rarely made of wood pulp. US dollars are 75% cotton and 25% linen, while euro banknotes are 100% cotton fibre, with protective coating. Notes issued by Bank of Canada and Bank of England are made of polymer. Widely circulating banknotes can last only as little as 1-2 years, but longer on average. US denominations between $1 and $20 last 5-8 years before succumbing to wear and tear, while the more rarely used $100 note lasts 23 years on average. UK’s new polymer banknotes are supposed to last 2.5 times longer than the previously issued notes, but the expected durability is in line with the US, 5 to 20 years. Notes are susceptible to damage, the paper based ones could rather easily be creased or torn. High temperatures and fire destroy both fibre-based and polymer notes. Paper banknotes can also be damaged by a washing machine, when forgetfully left in garment’s pockets, but fortunately usually not to the extent that they cannot be replaced by a bank. On the low side, I assign a score of 6 to the durability of paper and fibre banknotes, when used for daily transactions. On the one hand, their lifetime is really low, on the other they can get replaced by central bank rather “invisibly” to daily users. On the high side, I assign a score of 8 to the high denomination polymer bank notes as they can theoretically be used as a store of value for decades, assuming no or low increase in money supply.

The electronic money we own as deposits are maintained as part of bank’s IT infrastructure. Ultimately, the data pertaining to your balance are likely stored on a hard drive and/or magnetic tape. While the failure rate of hard drives is relatively high at nearly 1% annually, this does not mean that the durability of the electronic money should be counted in years or decades. Banks have extremely sophisticated systems that need to take into account not only equipment failure but also, much more importantly, the malice of cybercriminals. Banking institutions employ near-instant data backups, recovery and restoration, sometimes with backup intervals as frequent as mere minutes. Copies of data are geo-redundant, meaning that on top of on-site backup, several remote or cloud storage sites will likely be used. IT infrastructure (operating systems, applications and configurations) is also similarly backed up for a fast restoration in case of outage. Clients are more likely to lose money in bank’s run and/or bank’s failure. Fortunately, the deposits are currently insured in over 100 countries; the sums are for up to $250k in the US, €100k in European Union and £85k in the UK for one depositor and one bank. Safeguarding €500k or $1 million from bank’s failure is possible, all one needs is several accounts in different institutions.  Choosing banks with stronger balance sheets also helps. Large, systematically important banks will likely be saved by governments via bailouts. As the modern world is on the current banking/money system for just several decades, it not certain what the durability of electronic money really is. It is plausible we should assume timeframes of centuries or longer. I score the durability of electronic money as 10 for smaller depositors and 9 for those above insurance limits.

Gold and silver are notable for their durability, as stashes of coins from 2000 years ago are still being discovered. They are considered noble metals for a host of reasons: they are resistant to elements, fire, and nearly all chemical substances with the exception of cyanide, strong acids or their mixture (aqua regia). Contrary to James Bond “Goldfinger’s” movie plot, it is even impossible to irradiate pure gold, as it has only one stable isotope, and the unstable one has a half-life of about six months. Unfortunately, as unique as they physical and chemical properties are, they are not 100% resistant to wear and illegal debasement. There are two types of the so-called “sweating” techniques, a mechanical one and a chemical one, that allow to illegally obtain metal from circulating coins. The first method, known for centuries, required putting a large number of gold coins in a bag and shaking it for an hour or so. This would produce small metal clippings and gold dust that would be gathered by criminals. The newer the coins, the better the results. The second method required immersing gold coins for a short period of time in a solution of aqua regia, then washing and polishing them. Gold dissolved in the mixture of acids was easily obtained by evaporating the solution and melting the residue.  This methods gained popularity in American West towards the end of 19th century. I’m scoring both metals as 10 for long-term store of value. For the durability as medium of exchange I’m scoring gold as 9 due to its softness and susceptibility to aqua regia. Silver is slightly lower at 8, as it wears faster due to daily use, tarnishes in air and is soluble in rather easily available acids.

The distributed nature of blockchain nodes that contain the history of all crypto transactions ensures that the durability of data in the storage is very long lived. Given the sheer processing power required to confirm the Proof of Work (PoW) transactions on BTC and ETH blockchains, the system is likely better protected than banking systems. Even though Bitcoin has been around for only a dozen or so years, it seems very safe so far, as the blockchain itself is resistant to hacking or double-spend. We can assume that large enough number of programmers pored through its code, so that an incident like creating 184 billion BTC in one block is impossible now or will be corrected without any long-term consequences. Given current state of affairs, the durability of PoW blockchains could be described as indefinite – likely lasting many decades or perhaps even centuries, allowing for a score of 10. However, blockchain has several potential vulnerabilities. One of the better known is the so-called 51% attack. While Bitcoin has not yet suffered it, other cryptocurrencies (e.g. BSV, BTG, ETC) did. The costs to conduct a 51% attack are high, but not insurmountable and are within reach of a state agent or wealthy individual(s). Perhaps a solution to this problem is changing the consensus mechanism to Proof of Stake, as Ethereum is planning to do in the near future. Another threat comes from improvement in quantum computing. Some experts claim that progress in this area might make cryptocurrencies vulnerable as soon as 2035. Others point to potential vulnerability of the first 4 million or so Bitcoins mined prior to 2010, when the hashing function used a different, less safe format than now.

It is possible that solutions to potential problems will be found before they materialize and worrying more than a decade ahead is being overly cautious. However, even if there are no significant issues with Bitcoin or Ethereum in the future, it is possible that better solution to serve investors and clients within the crypto sphere will be developed. In that case, the durability of cryptos will be maintained, but the leaders will change. “On a long enough timeline, the survival rate for everyone drops to zero”, Fight Club taught us. “Diamonds Are Forever”, but we can’t be so sure about the most popular coins. I’m assigning a score of 9 on the low side of the estimate of durability, trying to account for current and future potential problems described above, but it is worth remembering that there’s non-zero probability of complete failure of any given coin.

UNIFORMITY
The electronic money used in any given country is uniform, as any transaction is represented just by a number (score 10). The coins and banknotes are not uniform. There come in different designs, colours and they are made from different materials. This is done primarily to increase recognizability, but coupled with lack of divisibility, this may create occasional problems, such as inability to give back change due to lack of appropriate notes or coins in the cash register. You can’t tear a 20$ or 20€ note in half, to represent 10$ or 10€ of value. On top of that, uniformity is weakened when a new banknote series is issued, for example to increase security, and the old one maintains legal tender status. I’m assigning a score of 8 to account for these issues with coins and banknotes.

In theory gold and silver are extremely uniform as they are chemical elements (score 10). In practice, different countries employ(ed) different coins using different alloys and precious metal purity. Even when a coin lasted several centuries, the design changed with every ruler. I’d assign scores of 8 to 9 for most places and most times that have been on precious metals standards, but there were certainly times and places of monetary chaos, where a much lower score of coinage uniformity would be warranted.

Individual cryptocurrencies are fully uniform (score 10), as transactions values and balances are represented by a single number. The split into Bitcoins and satoshis or Ethers and weis is not actually reflected in the structure of blockchain transactions.


DIVISIBILITY
Electronic money are divisible, allowing for any transaction sum (score 10). Coins and banknotes are not fully dividable. They come in several denominations (for example, 1€, 2€, 5€, 10€), which makes a cash payment of sums like 33.77€ a bit cumbersome (score 8).

In theory, gold and silver are divisible to a single atom, hence a potential maximum score of 10. However, in practical applications (payment with gold and silver coins) they did suffer from the same denomination issues as modern coinage (score of 8).

Cryptocurrencies are sufficiently dividable (score 10). The smallest unit of Bitcoin (one satoshi or 10-8 BTC) is currently worth ~0.0002 USD, while the smallest unit on the Ethereum blockchain (one wei or 10-18 ETH) is worth an infinitesimally small amount, even expressed in US cents. In other words, the price of Bitcoin would have to increase to over 1 million USD in order to have first divisibility issues, as 1 satoshi would then be worth 1 US cent.

LIMITED SUPPLY

Fiat money has the biggest range of possible outcomes. Countries that hyperinflate their currencies receive the score of 0. Countries that enjoy the GDP growth of ~2% and target CPI inflation of ~2% will likely inflate the money supply by about 4% annually over the long term, receiving a score of 8. In mid-2022 there’s a whole range of CPI increases in different countries, with the worst offenders experiencing CPI inflation rate of between 30% and 500%, deserving very low scores, perhaps in the range of 1-5.

World Gold Council estimates above ground gold stocks of 205 thousand tonnes, while mine production of the yellow metal has been around 3000-3300 tonnes in recent years. This translates to about 1.5-1.6% of annual increase of gold supply and a score of 9. Silver’s above ground inventories are substantially more difficult to estimate, but let’s go with the CPM Group’s estimate of stock-to-flow ratio of 30-60. That’s an inflation of 1.7-3.3% and a score of 8-9.

Bitcoin’s supply increased by 1.8% in the year to June 30, 2022 while Ethereum’s supply increased by 4.2%, with respective scores of 9 and 8. However, the Bitcoin algorithm ensures that the new annual supply will asymptotically reach zero, so the future score of Bitcoin will be 10. Ethereum Foundation experiments with burning a small amount of ETH coins with every transaction are opening a possibility of a declining total money supply and a score of 10+.

RECOGNIZABILITY/ACCEPTABILITY
The state issued money that we use every day has no issues with recognizability. In most countries we can readily identify both the banknotes and coins for what they are, as there are no objects closely resembling them due to strict laws against counterfeiting. Forged bills are very rare – about 0.02% of bills are fake in the UK, 0.01% to 0.025% in the US and only 0.001% in the EU. In most countries individual banknotes differ substantially in colour and size, while coins are often manufactured using different metal alloys or two alloys (see €1 and €2 coins). The electronic money is also easily recognizable as part of payment systems, whether wire transfers or card payments. I assign a score of 10 to all forms of fiat money.

Precious metals have an established place in nearly all cultures. Gold jewellery has a long history and even in modern times is rather popular. As most people get married it is more likely than not for an average adult to wear a gold ring at some point of their lives. Gold is relatively easy to recognize as metal, due to its unique yellow colour. In the antiquity silver was the only ‘silvery’ metal, however nowadays it has many lookalikes. Palladium, platinum, rhodium, nickel, chromium, aluminium, even cobalt are largely similar in colour. While nobody would use more expensive metals, such as rhodium, palladium and platinum to imitate silver, alloys of base metals, such as alpaca or ‘German silver’ had been. Various methods of counterfeiting precious metals have been used, from silver electroplating of copper coins to using tungsten inside gold bars. Receiving gold or silver from an unknown source carries risk. Acceptability of gold and silver coins varies substantially depending on the country and demographics. In this context it is perhaps worthwhile to mention a long tradition of using gold coins and gold objects as emergency money for US military and UK RAF’s pilots in WW II, Vietnam War and even in 1991 Gulf War. Apparently, it was established that recognizability and acceptability of these objects of value will be high, even behind enemy lines. However, given actual responses in videos like this and this, and many more like them in this particular youtube channel, it is tempting to assign a value of 0 or 1 to gold as money or an object with a recognizable value to an average citizen in the United State nowadays. One would, perhaps, be forgiven for suspecting that these responses have been staged or at least chosen from a larger subset given dramatically different responses elsewhere. On the streets of Singapore the knowledge of gold in is substantially better, perhaps warranting an acceptability score between 5 and 7. This could be attributed to Singapore being a financial centre as well as the impact of Chinese and Indian culture. One knowledgeable lady in the video apparently speaks a dialect of Chinese and skilfully translates gold values into renmibi. One gentlemen specifically states that he is Indian and his wife buys gold jewellery, so he knows the value of gold. The recognizability and acceptability of precious metals as money or investment seems to be rather low in most Western countries, perhaps with the exception of Switzerland, Germany and Austria, but higher in India, China and other Asian countries, especially in the Middle East. The analysis is further clouded by the fact that in some countries consumers buy gold mainly as coins and bars, in others mainly as jewellery. In the latter case it is sometimes not easy to disentangle to what extent the purchase has been done as an adornment or as an investment.

It is difficult to come up with one assessment for worldwide recognizability and acceptability of precious metals, as it seems to range between 1 and 10 depending on the specific population. I’ll go with a 5, but with low conviction of the estimate.

15 years ago the concept of cryptocurrencies did not exist, in the past 10 years there has been a gradual adoption and recognition of the idea. In a Pew Research’s September 2021 poll 86% of Americans said that they have heard at least a little about cryptocurrencies, while 24% heard a lot. 16% hey personally have invested in, traded or otherwise used one. It is a substantial increase vs. 2015, when only 48% of Americans recognized Bitcoin and just 1% said they had ever collected, traded or used it. On the high side there are countries where cryptocurrencies are even more popular. In a 2020 survey, 32% of Nigerians said they use or own crypto, as well as 21% of respondents in Vietnam, 20% in the Philippines and 16% in Turkey. However, the worldwide average is lower. The number of crypto users was estimated at about 300 million as of 2021, which translates to about 4% of global population.

So, acceptability is rather low currently, I score it as 1. Recognizability is much higher. As mentioned before, 86% of Americans have heard about cryptocurrencies. The numbers are similar in Japan (88%) and UK (93%). In 2018, an ING bank report put the UK awareness at 61% and American at 51%. It was somewhat higher in continental Europe (66%) with Poland and Austria even higher – 78% and 79% respectively. So, the basic recognizability in the Western countries likely is between 85% and 95% as of mid-2022. Another ING report, from 2019, asked several questions to measure the level of crypto-related knowledge. It categorized the responders as possessing either low (13%), medium (57%) or high knowledge (31%). Based on the Pew’s Research and ING Report it seems that about 25%-30% of Western population has the level of knowledge that could be described as sufficiently high. I assign a score of 3 to crypto recognizability. Given the high number of people who have heard about cryptos in general, this number is likely to grow with time.

PORTABILITY
The dictionary definition of portability is “the ability to be easily carried or moved”. With regards to money we have two concepts here: transportability and transferability. The former considers the ease of move over large distances, while the latter the ease of exchange between persons or institutions.

Coins and notes are easily transferred between people and on short distances, but due to their physical nature, not so easily over large, especially intercontinental distances. It takes just several seconds to reach to a wallet and hand over some notes and/or coins to another person. Arguably the process is too easy, given how effortlessly cash can sometimes be stolen. I assign a score of 10 for cash (coins and notes) transferability and a score of 5 for long distance cash transportability.

Gold and silver coins can be exchanged between persons on short distances with similar ease as the ‘normal’ coins and banknotes, which made them the staple of monetary systems for over 2500 years. However, given the global reach of our modern economy, a transfer between countries or even an intercontinental transfer is sometimes warranted. In 2013 Germany decided to repatriate a portion of its gold reserves held in New York and Paris to be stored in Frankfurt. Between 2013 and 2017 Bundesbank transferred 743 tonnes or about 1/5th of its reserves. The bars held in New York had to melted and recast in order to conform to ‘Good delivery’ standard of the LBMA. The whole transfer took 5 years and the price tag was €7.6 million. While undoubtedly high in nominal terms, it amounted to only 0.03% of the €31 billion worth of gold moved. I assign a score of 10 for person-to-person transferability of gold and silver coins and a score of 5 for large-distance, large-value gold transportability.

The core functionality of cryptocurrencies is that they can be transferred between any electronic devices in the world, be it personal computers, laptops or mobile phones. It is usually very efficient over long distances, but arguably not as convenient for short distances as hand-to-hand method of coins and notes. Transporting crypto around the world is very fast. While the transactions of the first crypto “incarnation” – bitcoin – require 10-60 minutes to get confirmed, there are plenty of solutions that allow for finality that is near-instant or takes seconds. However, transferability is a bit cumbersome compared to notes or coins as it takes more time and effort to transfer crypto than hand over cash, even with a convenient app and scanning of a QR code. As with any form of electronic money there can sometimes be problems with access due to poor internet connection – in the wilderness, outside of main cities, in tunnels, underground or inside buildings – which precludes us from making a transaction at a given place and time. I score the transportability very high, at 10, but the transferability currently at 8-9.

PART 1 CONCLUSIONS
As we can see, determining whether a given type of money holds required characteristics is a complex task. Some qualities are stable and easy to score, but others quite cumbersome to analyse, different in various places and times and subjective. State issued money suffers mainly from instability of supply, which in the past year or two affected even the most venerable currencies of developed nations. Low durability of (paper) cash and inability to transfer it over large distances is mitigated by modern electronic money. Gold and silver score rather high on most characteristics, which is not surprising, as they have been at the core of monetary systems for 98-99% of human economic history. They currently have moderate-to-low recognizability, as they have been dethroned by fiat money. Crypto scores high on most traits, but suffers from low recognizability and even lower acceptability. It is also not certain whether cryptocurrencies are really durable, given their short history and potential threats.

Part 2 will deal with the functions of money: a unit of account, a medium of exchange, and a store of value. They are connected with characteristics of money, but we will look at these three types of money from different angles.

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Bridgewater & bitcoin

This note is written as a discussion/response to the recent bitcoin research piece by Bridgewater.

I have read the article by Ray Dalio and the Bridgewater team with great interest. It is an important voice about bitcoin and cryptocurrencies from one of the world’s premier asset managers and it is likely that it will help to legitimize this asset class in the eyes of institutional investors and their clients. My previous experience and analyses are in agreement with many parts of their analysis. There is the regulatory section, where I cannot provide perspective, as the situation substantially differs, depending on jurisdiction and investor or organization type. I decided to concentrate on several areas, where I thought my experience and analyses coming from nearly 10 years of investing in bitcoin may be of interest to the reader. Mr Dalio shared his thoughts on the topic in the introduction, and then deferred to his research/analytical team. I will, therefore, provide a perspective to and discussion of the main body of their research.

Before I start the main part of my commentary, I think it may be worthwhile to share some of my background, which may have influenced my thinking. I have been an investor in bitcoin since June 2011 and have co-founded a start-up in cryptocurrency area. This may have resulted in me having a pro-bitcoin bias. I have invested in precious metals since 2004 and have been a portfolio manager for several precious metal mutual funds in 2012-17. It is possible that I have a pro-precious metals bias. Discussions concerning bitcoin to some extent circle around it being a competitor to gold, so it is my hope that these two biases of mine largely cancel one another out.

Bridgewater team analyses the nature and future of bitcoin as a potential new asset class. I have decided to discuss these three areas:
1) Volatility
2) Liquidity
3) Bubble dynamics and speculation

1) Volatility
One of the main concerns of the Bridgewater team was that bitcoin remains an “extremely volatile asset”. I propose that, in fact:
A) bitcoin’s volatility, while high compared to other asset classes, “should” have been substantially higher in the past,
B) asset class volatility can be a neutral factor in many portfolio implementations,
C) in some portfolio implementations high volatility can be a positive factor and add to portfolio return and Sharpe ratio.

A) Bitcoin’s volatility has undoubtedly been nominally high when compared to other asset classes. Annualized volatility between September 2011 and January 2021 has been unusually high at 99%. This is more than six times higher than S&P 500’s volatility that was 16% over the same period. US Treasuries with 7–10 years to maturity were less volatile still – just 5.8%. However, any risky investment should be considered in conjunction with the return it provides(d). Bitcoin delivered annualized return of 157% over these 9+ years, which resulted in an exceptional Sharpe ratio of 1.58. Stocks have delivered a respectable SR of 0.76, while bonds a more modest SR of 0.16. Averages for most asset classes have been around 0.30-0.35 over the very long term. It is quite clear that holding bitcoin over the past 9 years has been an excellent proposition from a risk–adjusted standpoint, as much as 4.5 times better than long term averages recorded for other asset classes.

In this context, I do not consider bitcoin’s past volatility to be high. It could have been as much as 4x higher and it would still be a reasonable investment. 80% corrections in bitcoin are obviously painful, but admittedly they could have been much deeper. The question still remains concerning future expected returns and whether they will be high enough to compensate for the heightened volatility. It is certainly reasonable to expect bitcoin’s returns and Sharpe ratio to drop in the future towards levels typical for established asset classes. However, as it will be shown in point C), even in a scenario of zero price appreciation bitcoin can potentially be a valuable addition to diversified portfolios.

B) I feel a bit eerie writing this part in a response to Ray Dalio and the Bridgewater team. Ray was THE person that invented what was subsequently named Risk Parity and Bridgewater is running the biggest Risk Parity fund in the world. They helped to popularize the idea that assets should be evaluated based on the risk-adjusted basis and that investments characterized by both very high and very low realized and expected volatilities could be considered equals in a rational and well constructed portfolio. As Risk Parity’s universe is very wide and most implementations span government bonds and commodities, it is reasonable to assume that as of this moment the All Weather portfolio holds both the 2 year Treasuries and natural gas futures. The first asset class had an annualized volatility of 1.2% over the past year (as measured by the volatility of SHY ETF), while the second had the volatility of 58.4% (as measured by the volatility of UNG ETF). So, asset class with the highest volatility held by a Risk Parity fund can experience as much as 46 times (!) higher volatility than the asset class characterized by the lowest volatility. A wide asset class universe is similarly used by other asset managers, beyond Risk Parity implementations. In that light, adding bitcoin to a portfolio, with historical volatility of just 1.7 times higher than that of natural gas futures does not seem too extraordinary to me. Once an analysis is performed that takes into account portfolio assets’ historical and expected returns and volatilities as well as their correlations, it is quite reasonable to assume that assets with annualized volatilities of 1%, 10% or even 100% can be valuable additions. The exposure to each asset class could, obviously, be scaled by the inverse of expected volatility, which would make bitcoin’s share proportionately lower. An asset class does not have to be excluded just because its volatility is unusually high. To the contrary – there is one good reason to include it, as described in the following section.

C) It seems that it is still a relatively little-known fact, that there are portfolios in which the higher the volatility (ceteris paribus) – the better. For those who have not looked closely at the nature of the rebalancing return (RR) this may sound like a heresy. One reason RR is relatively unknown may stem from the fact that it is an insignificant part of returns in traditional portfolios consisting mostly of stocks and bonds. A portfolio consisting of 50% bonds (IEF ETF) and 50% cash would record a RR of just 0.01% over the past year, while in a portfolio with 50% of stocks (SPY) and 50% of cash RR would add 0.29% to its overall return. In contrast, rebalancing return would add as much as 7.8% annual return to a portfolio consisting of 50% bitcoin and 50% cash. The second reason is that for securities which receive return from income and/or growth, additional volatility is obviously an anathema – it “dilutes” the main sources of return and results in a lower Sharpe ratio. For instruments and portfolios that receive no income and have no growth component (such as commodities), rebalancing return is the only viable source of return.

So, how does RR work? One of the first systematic reviews of the topic was performed by Willam J. Bernstein in 1996 (Rebalancing Bonus: Theory and Practice). He provides the following equation for a portfolio of two assets:

 Where RR is rebalancing return, w1 and w2 are weights of the rebalanced securities, σ2 are their variances. σ1,2 is the covariance between the two. To simplify a bit, let’s assume we analyse a portfolio consisting solely of a single instrument and cash. We get:

As we see, rebalancing return is proportional to security’s variance. This means, that as volatility increases, Sharpe ratio INCREASES in direct proportion to volatility. Rebalancing return is also dependent on weights. The first two terms reach a maximum at 50%/50% weights, which is one reason why equally-weighted portfolios may be optimal in many implementations.

Let’s see how this works in practice. We will look at the impact of rebalancing return on two portfolios – one consisting of 50% bitcoin and 50% cash, the second with 10% bitcoin and 90% cash. The portfolio is rebalanced weekly and cash yields zero. We look at the period of nearly 3 years – from the peak of 19,200 BTC/USD on Dec 16, 2017 to Nov 24, 2020 when it again reached that level. This is to show, that an investor can still enjoy gains, even in a period when bitcoin’s total return was exactly zero. Portfolio holding 50% of funds in bitcoin would have delivered 28.1% return (annualized to 8.7%), while portfolio holding 10% of funds in bitcoin would have recorded 9.1% return (3.0% annualized). Results are summarized in the table and illustrated in the figure below.

As we see, a low 10% allocation to bitcoin would allow to realize a Sharpe ratio of 0.38, which is comparable to long-term averages for most asset classes. This has been achieved in a period of zero overall price change. Further reduction in bitcoin allocation results in only small Sharpe ratio increase – a portfolio holding 1% in bitcoin and 99% in cash would enjoy a SR of 0.396.


To summarize: while nominal volatility of bitcoin has been high in comparison to traditional asset classes, it has been quite low, when compared to returns that the instrument delivered, resulting in an exceptionally high Sharpe ratio of over 1.5. It could still be held in traditional portfolios in low allocations of 1-10%. Even in times of overall zero price appreciation for bitcoin, such implementation would result in achieving a Sharpe ratio of 0.38-0.40, assuming the remaining components were uncorrelated to BTC. A low allocation to bitcoin would help with another problem flagged by the Bridgewater team – liquidity.

2) Liquidity
The Bridgewater team writes:
“current levels of liquidity still constitute real structural challenges to holding Bitcoin for large traditional institutions such as Bridgewater and its clients”

While one does not need liquidity to “hold” an asset, just to enter or leave a position, we can understand what was meant here by the Bridgewater team. Bitcoin is, as of now, an emerging asset class, and any institution and its clients need to have an OPTIONALITY to close a part or the whole position at any given time. There is a possibility of a better crypto implementation, regulatory risk, etc., that may prompt a client to liquidate a position at a moment’s notice. Even the simple strategy that I analysed in the previous section (hold 10% of portfolio in bitcoin) needs some liquidity for weekly or monthly rebalancing, although in one implementation variant the investor pursuing such a strategy would be a liquidity provider rather than a taker.

Bridgewater is one of the most successful asset managers of all times. They know what they need to implement their proven strategies and liquidity is one of prerequisites. However, there is the possibility that profit opportunities in crypto area may be to a substantial degree inversely proportional to liquidity. This may or may not be equivalent to traditional illiquidity premium – due to market fragmentation and lack of sophisticated institutional investors. As an extreme exercise, almost ad absurdum, let’s consider what would happen, if an institution such as Bridgewater, disregarding miniscule liquidity available at that time, invested a paltry one million US dollars in Q4 of 2011. Total supply was just 4-5 million BTC at that time, while the average price was ~3.25 USD. Accumulating 6-8% of total BTC supply would be a very difficult task indeed, although devoting several offices at Bridgewater’s HQ to BTC mining rigs would certainly be of substantial help. By late January 2021 this very modest investment would turn into a cool 10 billion dollars – a substantial sum, even for a giant like Bridgewater. It is obvious that this opportunity is gone and instead of a 10000x increase we are looking at 10x increase, at the most. However, it is possible that liquidity-constrained opportunities are still there, proportionally reduced in potential percentage increase, but not necessarily in the absolute dollar size.

As a separate observation, I would like to draw the reader’s attention to the large disparity that spans this section and the next. When discussing liquidity constraints, Bridgewater assumes that daily liquidity available to their strategies amounts to ~7.4 USD bln in cash and derivatives or 1.3% of total BTC supply. When discussing speculative excesses in contrast to long-term-store-of-value trades, they provide a chart that documents daily liquidity some 15 times higher – amounting to ~19% of total BTC supply. In their defence, they do admit that the 1.3% daily-liquidity-available-to-our-strategies figure is likely conservative and the 19% speculation-not-long-term-investment figure is likely impacted by “questionable volume data reported by unregulated exchanges”. There is always a spread between the bid and the ask, but I leave it up to the reader to decide, whether quoting two estimates of the same metric in one document that differ ~15-fold when supporting the “take the risk” and “do not take the risk” arguments is justified to such an extent.

3) Speculation & bubbles
First, some of my general thoughts about speculation and bubbles, and how they relate to bitcoin.

99bitcoins.com/bitcoin-obituaries documents 396 instances of different websites declaring bitcoin’s apparent death. The first entry is from late 2010, when BTC price was 0.23 USD. In the past there were hundreds of failed predictions of bitcoin being in a bubble and there may be dozens more. There will likely only ever be one prediction that will come true. The Bayesian in me takes these odds/probabilities as priors.

I suppose most observers who declared bitcoin being in a bubble in the past might not have noticed one important aspect that made this particular asset class different from many other asset classes that underwent substantial price appreciation. Satoshi Nakamoto went public with the concept before the first bitcoins were mined. Everybody on the planet could have gotten first bitcoins by the thousands – for free. It is likely that their value was negative, as valuable computers and electricity had to be used to create assets of zero value. Anybody with the basic understanding of maths can calculate what the expected return is, when an asset that was initially worth zero increases in value to be worth SOMEWHAT – whether that somewhat is a million USD or a trillion USD. Yes, it is +∞ (plus infinity). In theory, there is an infinite number of sequential “bubbles”, of any size, that can “fit” in an advance from a value of zero, to any finite value – whether that value is a million or a trillion. In practice, when the first transaction is made, this collapses to some finite number of sequential “bubbles”. Laszlo Hanyecz agreed in May of 2010 to pay 10 thousand bitcoins for two pizzas, worth approximately 25 dollars, thus setting the price of BTC to 0.25 US cents. Oftentimes an asset class is called a “bubble” when it advances 5-10 fold. Since that first transaction, bitcoin’s price increased some 12 million times, which allowed for about seven back-to-back bubbles, each advancing 10-fold. We could add several more bubbles, if we included the intermittent corrections in the process. With bitcoin market capitalization of 600 billion USD as of this writing and value of all the gold used as an investment worth about 5 trillion USD, it seems, at least to this author, that bitcoin can scarcely be expected to deliver one more 10-fold bubble.

I think the reader would agree that it is generally accepted that bubbles are considered unwise and irrational; there is a negative aura attached to them. However, I propose that FASTER advance from zero value to the final value of an asset may be a sign of rationality, rather than irrational behaviour. This can be demonstrated by near-instantaneous vertical advances that follow many economic and earnings releases. Slower price advance might mean that information is being absorbed at a slower pace. In this light, unusually fast advances in the price of bitcoin (especially in comparison to other asset classes) may simply be a sign of it being substantially below its target price and absorption of this information by new market participants.

Now, back to commentary on the Bridgewater article. I think they provide a rather balanced and guarded assessment of bitcoin being in a bubble or a speculative asset. On the one hand, they draw the reader’s attention to some concrete metrics: volume traded, rising financing rates and option pricing. On the other hand, they admit that such bubble dynamics “can persist for extended periods”.

Concerning volume traded, I’m not sure if it supports the thesis of bitcoin being in a bubble, but it likely supports the thesis that there is substantial amount of speculative trading going on in cryptocurrencies. I have no strong conviction here, as Bridgewater rightfully draws attention to “questionable volume data” provided by some exchanges. I will not delve deeper into this topic but would like to point out the fact, that volumes traded as percentage of supply reached the maximum when BTC fell in March 2020 from about 9000 BTC/USD to the low of 3600 BTC/USD – the very opposite of it being in a bubble.

I am in full agreement, that rising borrowing rates (and higher financing rates embedded in futures pricing) correlate with increased speculative fervour. In my experience they coincided with later parts of consecutive price advances since at least 2016. Financing costs are currently lower than in late 2017, but this may reflect higher availability of capital earmarked for lending and futures financing than 3+ years ago.

I’m not sure, if the details concerning options pricing support the speculation/bubble argument. Bridgewater team writes: “Bitcoin options are currently pricing a very wide and highly optimistic cone of outcomes for future returns”. In support they provide a chart, that indeed is that of a cone. However, in the period analysed (Sep-Dec 2020) bitcoin’s price increased about threefold. As the Y scale on their chart is an arithmetic one, not logarithmic, the shape of 10%-50%-90% outcomes over time SHOULD look like a cone when bitcoin price advances, even with no change to other parameters. 10% and 90% outcomes could still be in similar distance “away” from the 50% outcome when measured in terms of percentages, but “further away” when measured in thousands of dollars. It is not readily obvious to me, which is the case here. Additionally, between September and late December there was an increase in 3M implied volatility of bitcoin options, from about 3-4% daily to 5-6% daily. A similar, but perhaps smaller, increase for 6M options IV could be expected as well. So, the widening of the “cone” could come not only from bitcoin’s price increase, but also from increased implied volatility. This is a sign that market participants price in additional risk (both to the upside and to the downside), not optimism.

It is possible that the 50% outcome for June 2021 has been higher than the spot price throughout the analysed period. This may be due to higher financing costs which, as I agreed to earlier, likely is a sign of optimism. As the cryptocurrency markets are not yet fully integrated into the overall financial system, there is no capital available at 0.25% per annum to finance crypto derivatives, such as futures and options. A crypto-specific interest rate (“Risk free” rate) needs to be used, in order to bring options and futures prices to some equilibrium.

Therefore, in order to estimate what can be read from bitcoin option prices concerning market sentiment it would, perhaps, be helpful to disaggregate “the cone” into four effects:

  • Bitcoin price increase
  • Change in implied volatility
  • Change in (crypto-specific) financing costs (that could move outcomes vs. spot price)
  • “Smirks” that may indicate optimism or pessimism embedded in option pricing.

To summarize my commentary: I recognize that bitcoin’s volatility is high in comparison to other asset classes. However, given returns and the Sharpe ratio it delivered in the past, it (ex-post) made sense to take such high risks in the past. It may continue to do so for some time into the future, though not indefinitely. One could treat bitcoin’s volatility a bit like ethanol or acetic acid. These substances are highly toxic at 100% concentration, but safer and potentially beneficial, when thinned to 3-6% and used as light beer or vinegar. Similarly, an allocation of several percent of assets to bitcoin may be beneficial for portfolio’s performance, especially due to the benefits realized from the Rebalancing Return.

I understand that the sheer size of Bridgewater Assets Under Management precludes the institution from taking a substantial position in cryptocurrency markets. I propose that the scale of profit opportunities is likely inversely proportional to liquidity and institutional presence. Perhaps it is also a signal to smaller and non-institutional participants that the opportunities are there, but large and successful institutions cannot engage in them as much as they would like to.

Concerning bitcoin’s bubble-like behaviour, I propose that in the past it largely stemmed from the fact, that this asset class started its ascent from a value that was as close to zero as possible. In such a situation multiple bubbles of 10-fold increases can form in sequence, before an asset class reaches its “fair” value, whatever that value is. Fast price increases may be coming from the fact that new market participants are being familiarized with bitcoin’s target value and consider it substantially higher than current spot price.

In any case, I am grateful to the Bridgewater team for sharing their thoughts in such an extensive and thorough research piece. It has stimulated my thinking and allowed to look at bitcoin from several new angles.

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