Bitcoin (BTC) is trading at $103,046 as of Friday, May 9, 2025, with market participants closely watching predictive models for clues about its next major move. Among the most popular tools are the Stock-to-Flow (S2F) model and the Bitcoin Rainbow Chart, both of which point to significant upside potential by late 2026. However, analysts caution that these frameworks, while historically insightful, are imperfect and should be used alongside other metrics.
Stock-to-Flow Model: Scarcity Suggests $275,000 by Late 2026
The S2F model quantifies scarcity by dividing the existing supply (stock) by annual production (flow). For Bitcoin, the flow is the number of newly mined coins per year. Each halving event reduces the flow by half, increasing scarcity and historically leading to upward price pressure. Currently, the price trajectory is shaded from red to orange, indicating that the market is about one year past the last halving (red = 0 days to halving, blue = many days past). Historically, strong rallies follow within 12-18 months. Extrapolating past post-halving patterns, the S2F model forecasts an exponential climb to approximately $275,000 by late 2026. This aligns with the scarcity thesis and is supported by institutional adoption via ETFs and companies like Strategy (formerly MicroStrategy). However, the model does not account for external shocks such as geopolitical events or trade policies, and it has faced criticism for oversimplification.
Rainbow Chart: From FOMO to Bubble Territory – $290K-$365K
The original Rainbow Chart predicts Bitcoin's price will move from the “FOMO” band (currently above $100,000) into the “Is this a Bubble?” zone over the next 18 months, targeting a range of $290,000 to $365,000. The colored bands represent long-term logarithmic growth, reflecting market sentiment thresholds. Critics note that the Rainbow Chart has been revised over time as more data became available, with enhanced statistical techniques to avoid overfitting. While not empirically rigorous, it provides a visual framework for sentiment-driven price expectations.
Guides, Not Oracles: The Limits of Predictive Models
Both models suggest Bitcoin's maturation is approaching another inflection point. Yet mathematical projections alone cannot capture all variables such as liquidity shifts, regulatory changes, or investor psychology. Traders are advised to treat colored bands and scarcity ratios as guideposts rather than deterministic forecasts. Deviations from modeled paths could spark debates over data integrity and encourage refinements that blend traditional finance tools with on-chain analytics. Ultimately, these frameworks help illuminate potential trajectories but do not determine the destination.