Vitalik Buterin Rejects Bitcoin Stock-to-Flow Price Model

Ethereum co-founder Vitalik Buterin has renewed his criticism of the stock-to-flow (S2F) price model for Bitcoin, labeling the theory as "false" and "harmful" while arguing that its predictions are unfalsifiable [1, 2]. The model, which forecasts Bitcoin’s future value based on supply scarcity following halving events, has faced increased scrutiny as the asset’s price has failed to align with previous six-figure projections [1, 2].

The critique of supply-based forecasting

The S2F model, developed by analyst PlanB, correlates Bitcoin’s price with its circulating supply relative to the annual issuance of new coins, which is reduced by half every four years [1, 2]. Proponents of the model argue that this programmed scarcity mirrors the value proposition of commodities like gold [2]. However, Buterin contends that the theory is "post-hoc rationalized" and fails to provide a coherent link between block halvings and price upswings [2].

Buterin points to historical data, such as Bitcoin’s all-time high of nearly $20,000, which occurred at the midpoint between the 2016 and 2020 halving events, to argue that the model’s timing is inconsistent [2]. While PlanB maintains that the model tracked Bitcoin’s performance for three years until March 2022, he has acknowledged that it has since deviated from its projected trajectory [1]. Critics outside of the Ethereum ecosystem have similarly argued that the S2F model ignores the demand-side factors that serve as the primary drivers of Bitcoin’s market price [2].

Scaling and the future of Bitcoin

Beyond price modeling, Buterin has advocated for Bitcoin to expand its utility through Layer-2 scaling solutions similar to those utilized by Ethereum [3]. He specifically highlighted the potential for zero-knowledge (ZK) rollups to increase the network's capacity beyond its current role as a payment system [3].

This push for innovation coincides with the growth of Bitcoin Ordinals, a solution that enables decentralized digital art storage on the blockchain [3]. Ordinals saw significant adoption recently, with inscriptions growing from 10 million at the end of May to over 16 million by the end of June [3]. Buterin noted that such developments help reinvigorate the innovation culture within the Bitcoin ecosystem, even as he continues to push for broader architectural changes [3].

What to watch

• Market Correlation: Monitor whether Bitcoin’s price action continues to decouple from the supply-halving schedule, which would further challenge the validity of the S2F model [2].
• Layer-2 Adoption: Track the integration of ZK-rollups or similar scaling technologies within the Bitcoin network to see if they successfully expand functionality beyond simple payment processing [3].
• Model Relevance: Observe whether PlanB continues to adjust the S2F model variables—such as removing time-based metrics—in response to ongoing market volatility and criticism [2].

The debate highlights a fundamental divide in the crypto community between those who view Bitcoin primarily as a scarce, supply-constrained asset and those who argue that its long-term value depends on network utility and demand-side innovation [2, 3]. Whether the S2F model retains any predictive utility or is discarded as a failed experiment remains an open question for market participants [2].