Introduction
In search for an increasingly better store of value, man has traversed a long path from shells to metals and now almost to digital assets. Since Bitcoin ($BTC) shares many qualities of a good store of value, it has attracted the attention of experts and retailers equally since 2009. It is scarce and fungible like gold, but since it has no physical existence like gold, it cannot be regarded as indestructible. A year before Bitcoin’s third halving in 2020, a pseudonymous writer PlanB introduced the Bitcoin Stock-to-Flow model to strengthen the narrative of store of value for $BTC.
What is the Stock-to-Flow Model?
The Stock-to-Flow Model can be defined as the result of a mathematical operation that involves dividing the total existing supply or reserves of an asset by its regular annual supply. As is obvious from the formula, if the annual supply of an asset is high, the result will be lower. A higher number in the result will emerge if the supply is limited. The introduction of the model into the Bitcoin ecosystem proved exciting for the long-term perspective as the annual supply of Bitcoin is programmed to decrease after every halving event, which is set to take place roughly every fourth year. It means $BTC stock-to-flow value will keep on increasing periodically.
The origin of the public’s excitement was the reference to gold, which has a stock-to-flow value of roughly 60 to 65 at the time of writing. According to the latest data in February 2026, the total gold supply in circulation is 205,000 metric tons. A careful estimate reveals that around 3000 to 3300 metric tons of gold is added to circulation every year. As we can see, the annual supply is very small, making the asset extremely valuable.
Why the $BTC S2F Model Got Traction
Since the time PlanB came up with the model for Bitcoin, analysts observed that the mode was immaculately predicting the price action. The reason was probably that the halving even in 2020 propelled the asset to new highs the very next year. The bullish momentum and elevated S2F values made the model very popular. PlanB himself showcased and bragged about the accuracy of the model very often on social media, especially on X, in words such as “just like clockwork”.
How the Model Works in Bitcoin Context
Unlike gold, the supply of which will keep on hitting the market no matter at what rate, there are never going to be more than 21 million $BTC, ever. The mining of gold may accelerate, and the annual supply may also go up as a result of advanced technology, but the new supply will only decrease in the case of Bitcoin. This implies that in terms of scarcity, $BTC even beats gold.
Now, if we think of $BTC in line with the calculation with gold, 19.98 million $BTC have been mined, and are now in circulation. Current mining hash rate reveals that around 450 new coins hit the market every day, making the annual addition 164250. The stock-to-flow value of Bitcoin comes out to 121. The figures are so impressive that retailers come pouring in, and invest whatever they can. Yet, the volatility is a serious hurdle in its way to practically surpassing the well-established assets like gold and silver.
Criticism from Analysts and Researchers
As is always the case, when an idea gets some credit, critics cannot be kept silent. The most important reservation from critics comes regarding the element of demand. The factors of circulation supply, annual supply, and the resultant S2F values are useless if the demand dwindles or even becomes stagnant. Gold has a market cap of $35.2 trillion today because its demand has only been increasing since humans started considering it valuable.
Another line of criticism appears from recent critics who argue that past accuracy does not guarantee that the model will be reliable in the future. The scientific method dictates that a one-time happening is not sufficient to predict the future, so scientists emphasize taking at least three readings in lab settings. The Bitcoin Stock-to-flow model did predict prices in 2021-22, but it would be a sweeping statement that the model is perfect. To be honest, the model did not go as per predictions after the halving of 2024.
Performance of the Model in Recent Years
The price of $BTC in December 2021 was around $15,500. The news of institutional adoption and ETF approvals stated an uptrend, as a result of which, it touched a new ATH of $73000 in March 2024, a month before the halving. However, after the halving, when the S2F value crossed 100, the price actually started dipping. A hype on the ascension of Trump took $BTC past $100,000 and to an ATH of $126,000 in October 2025. The pre-halving rally was with the same S2F value with which $BTC traded at $15,500. If a better value were an indicator of better performance, $BTC should have gone past $250k or $300k. However, the price did not even go 2X of the pre-halving ATH.
Conclusion: Where the Model Stands Today
The major significance of the Bitcoin S2F model in 2026 lies in the educational realm more than in the practical world. Students in the crypto market gain an understanding of how supply mechanics work in decision-making when it comes to the choice of assets. The study is also beneficial in understanding how and why Bitcoin is often compared with gold. The factors of scarcity drive the demand and price action of an asset.
Professional traders agree that no one should take the model as a primary forecasting tool. In fact, this is by no means to undermine the importance of the model itself. Rather, no tool in technical as well as fundamental analysis can drive your trades alone. You have to use every tool in the right combination with other supporting tools. Therefore, it is wiser to combine multiple analytical approaches rather than trusting a single formula to predict future prices.
In a nutshell, the Bitcoin Stock-to-flow model emerged as a potent way to understand the asset’s price action five years ago, yet the market moves so intelligently that no single tool suffices in the long run.
Source: https://blockchainreporter.net/bitcoin-stock-to-flow-model-today/
