Bitcoin supply on centralized exchanges has reached a new all-time low, falling below 2.5 million BTC, marking the lowest level in six years and the smallest percentage supply since August 2018 at 14.5%. This decline represents the fifth consecutive week of outflows from exchanges, driven by increased self-custody and long-term holding among investors. The reduction in available Bitcoin on exchanges is widely interpreted as a precursor to a potential supply shock, which could influence price dynamics. Despite this trend, recent data shows that miners and whales deposited 81,000 BTC valued at approximately $123 million into exchanges last week, the largest spike since February. Miners alone contributed 16,000 BTC, the largest outflow since April. Meanwhile, Ethereum balances on exchanges have also dropped to one-year lows, with ETH deposits recently doubling to 2 million. The sustained decrease in Bitcoin supply on exchanges highlights a shift in market behavior towards accumulation and reduced liquidity on trading platforms.