Bitcoin's reserves on centralized exchanges have fallen to around 2.67 million BTC as of early 2026, reflecting a significant shift in market dynamics. This decline is attributed to a growing trend of self-custody, where investors are moving their assets into cold storage, and institutional accumulation through exchange-traded funds (ETFs). Currently, ETF custodians hold about 1.3 million BTC, which represents roughly 6.7% of Bitcoin's circulating supply. This structural change is coupled with a surge in illiquid supply, with over 72% of mined Bitcoin now classified as illiquid. The movement off exchanges indicates that many holders are not planning to sell soon, creating a scarcity that could influence future price movements. However, this thin liquidity also raises the risk of increased volatility, as modest sell orders could lead to sharp price declines. In essence, the market is becoming less about the total Bitcoin supply and more about how much is actively available for trading.