## Price Forecasting of Bitcoin Through the Lens of Scarcity: How the Stock-to-Flow Model Works

**Current Market Situation**

As of December 26, 2025, Bitcoin is trading at $86.90K with a daily decrease of 1.08%. Over its 16-year history, the first cryptocurrency reached a maximum of $126.08K, demonstrating volatility characteristic of digital assets. Amid these fluctuations, investors are constantly seeking tools to understand long-term trends in BTC development.

**The Controversy Surrounding the S2F Model**

The Stock-to-Flow model sparks intense debate within the crypto community. On one side, its supporters, including creator PlanB, claim a strong historical correlation between Bitcoin’s reserve-to-flow ratio and its actual market price. On the other side, critics—including Ethereum co-founder Vitalik Buterin—call it a “not very good” model, accusing it of oversimplifying market dynamics.

**How This Valuation System Actually Works**

The method is based on two key parameters:

- **Current Supply**: The total amount of Bitcoin already mined and in circulation (approximately 21 million coins at maximum)
- **Annual Flow**: The rate at which new coins are issued through mining

Dividing the first measure by the second yields the scarcity coefficient. The logic is simple: the higher this number, the scarcer the asset, and therefore—potentially more expensive.

**Halving as a Critical Moment**

Approximately every four years, Bitcoin undergoes a halving—an event where the reward for miners for discovering a block is cut in half. This automatically reduces the inflow of new coins, increasing the Stock-to-Flow ratio. Historically, BTC’s price has shown significant growth following halving events, which supporters of the model see as direct confirmation of its validity.

**Factors Beyond the Formula**

Critics rightly point out that the model ignores many variables affecting Bitcoin’s actual price:

1. **Changes in mining difficulty** — the network adjusts parameters roughly every two weeks, impacting the rate of new coin issuance
2. **Widespread adoption and demand** — growing acceptance of Bitcoin by corporations, investors, and as a means of payment
3. **Regulatory environment** — decisions by governments and regulators worldwide
4. **Technological improvements** — developments in scalability (Lightning Network) and network security
5. **Macroeconomic context** — inflation, currency devaluation, financial crises
6. **Altcoin competition** — emergence of new projects with potentially better functionality
7. **Market sentiment** — investor psychology, media coverage

**Practical Application for Investors**

If you consider the S2F model as a basis for your investment strategy, keep in mind:

- It works only over long horizons. Short-term fluctuations are unpredictable
- Use it in conjunction with technical analysis, fundamental indicators, and market sentiment analysis
- Set clear stop-losses and limit position sizes
- Constantly monitor news about regulation, technological updates, and economic conditions
- Do not rely solely on one model as the only forecast source

**Forecasting Achievements and Failures**

PlanB predicted reaching $55,000 after the 2024 halving and $1 million by the end of 2025. However, the current price of $86.90K shows that even the best models have limitations. Adam Back (CEO of Blockstream) supports the methodology as a logical extrapolation of historical data, while Corey Klippsten (Swan Bitcoin) warns that the model can mislead newcomers.

**Key Limitations of the System**

1. **Insufficient consideration of external factors** — the model focuses solely on scarcity, as if Bitcoin operates in a vacuum
2. **Past results do not guarantee future performance** — even if the correlation was high, it does not promise prediction accuracy
3. **Over-simplification** — the real value of Bitcoin is determined by a much more complex interaction of demand, supply, utility, and trust
4. **Risk of misinterpretation** — novice investors may take optimistic forecasts too literally

**Recommendation for Long-Term Market Participants**

The Stock-to-Flow model has a right to exist as one of the analytical tools. Its main value is a reminder that Bitcoin’s limited supply remains one of its fundamental factors of value. However, the future price of BTC will be determined by a much more complex set of variables: blockchain technology development, mass adoption, regulatory landscape evolution, and macroeconomic dynamics.

Long-term investors are advised to consider S2F as part of a broader analytical arsenal, rather than a universal crystal ball for predicting Bitcoin’s future in the volatile cryptocurrency market.