The ledger never lies, only the interpreter does.
The data shows a clear pattern: PlanB's Stock-to-Flow (S2F) model has failed to predict Bitcoin's price in 2022, 2023, and now 2025. The discrepancy is not noise. It is a structural error.
Context: PlanB, the pseudonymous Dutch statistician, built his reputation on a single linear regression. The S2F model maps Bitcoin's scarcity (stock divided by flow) to its price. It is elegant. It is intuitive. It is also dangerously oversimplified. Since the 2024 halving reduced block rewards to 3.125 BTC, the flow dropped by 50%. The model screamed $200,000 by end of 2024. Reality delivered $65,000—a 68% miss. The article you read recycles the same prediction: $500,000 to $1,000,000 before the next halving (639 days from now). There is no new data, no new methodology. Just hope.
But I audit data for a living. And the on-chain evidence tells a different story.
Core: The on-chain evidence chain.
Let’s start with realized cap. Bitcoin's realized capitalization currently sits at $420 billion. This metric sums the value of each UTXO at its last moved price. It represents the cost basis of all coins. For Bitcoin to reach $500,000, the realized cap must climb to roughly $3.2 trillion—a 7.6x increase. That requires either 7.6 times more coins moving at higher prices, or a massive shift in the cost basis. Neither is happening. The realized cap has been flat since November 2024, indicating that the average acquisition cost is not rising. New buyers are not stepping in at significantly higher prices. Demand is stagnant.
Next, MVRV Z-score. This metric divides market cap by realized cap and then z-scores the ratio to highlight extremes. Currently at 2.2, it signals that Bitcoin is moderately overvalued—but nothing like the 2021 peak (Z-score >7) required for a $500k valuation. The Z-score would need to reach 12.5 to justify that price. Even during the 2017 euphoria, the Z-score only touched 10. PlanB’s model implies an even more extreme bubble than history has ever shown.
Now examine long-term holder (LTH) supply. Addresses that hold coins for more than 155 days currently control 13.2 million BTC—a share that has been declining since December 2024. LTHs are distributing, not accumulating. The narrative of “HODLers refusing to sell at any price” is not visible on-chain. Coins are moving to exchanges, likely for liquidity. If LTHs believe in $500k, why are they selling at $65k? The data suggests they see lower prices ahead.
What about miner behavior? Post-halving, miner revenue dropped to about 300 BTC/day from 600 BTC/day. Miners are forced to sell more of their block rewards to cover costs. The miner reserve—the total BTC held by miner wallets—has fallen by 2.3% over the past three months. That is a steady drain of supply onto the market. Combine that with LTH distribution, and the supply side is not tightening—it is expanding. PlanB's model assumes supply scarcity drives price. On-chain shows supply is increasing in circulation.
Finally, examine the stablecoin liquidity. Tether’s market cap, a proxy for capital ready to enter crypto, has been flat at $95 billion for six months. No new fiat inflow. For Bitcoin to 10x, you need a flood of new dollars. The stablecoin data shows the pool is not growing. The liquidity is simply not there.
Contrarian: Correlation ≠ causation.
The S2F model makes a fundamental mistake: it treats scarcity as a direct price driver. In reality, price is a function of marginal demand and supply. The halving reduces the flow of new coins, but if demand is flat, price does not rise. The 2020 halving pumped price because of a coincident macro stimulus boom. The 2024 halving occurred in a high-interest-rate environment. The model cannot distinguish between correlation and causation.
Yield is a function of risk, not magic. PlanB’s prediction ignores the risk premium. For Bitcoin to reach $500k, the implied volatility and required return would need to collapse to levels never seen in any asset class. That is not how markets operate.
Based on my 2020 DeFi yield farming quantification project, I learned that any model that ignores the demand side is just a curve-fitted story. The S2F model is a story. A beautiful one. But stories do not pay the bills when liquidity dries up.
Volatility is the tax on uncertainty. The current uncertainty is high—regulatory, macro, and on-chain. The halving narrative is priced in. The next leg of Bitcoin’s price will be determined by real adoption and institutional inflow, not by a linear regression.
Takeaway: Ignore the $500k headline. Watch the signals that matter: MVRV Z-score above 3.0, LTH supply turning to accumulation, stablecoin market cap breaking $120 billion. These metrics will tell you weeks before any prediction. PlanB’s model is a broken clock—it is right once a century. Do not set your portfolio by it.
