Bitcoin extended its correction, affected by record single-day outflows from the world's largest exchange-traded funds and weakening expectations for a rate cut by the Federal Reserve. Bitcoin, Singapore's largest digital asset, fell about 3% to $65,380. Major coins such as Ethereum, Solana and Dogecoin also posted losses. Data show that the $25 billion Grayscale Bitcoin Trust (GBTC) reported an outflow of $643 million on Monday, the largest outflow since converting to an ETF on January 11. At the same time, funds flowing into giant products such as Fidelity Investments and BlackRock are also cooling down. On March 18, these 10 ETFs had an overall net outflow of US$154 million. Singapore-based cryptocurrency trading firm QCP Capital said it will pay close attention to today’s total ETF flow data, and a net negative number will be a clear bearish signal.