Bitcoin, the largest cryptocurrency by market cap, fell as much as 15% on Monday, dropping below $50,000 for the first time since February. Ether, the No. 2, fell for the seventh straight day, posting its biggest drop since May 2021, and was recently 22% lower over 24 hours. The CoinDesk 20 Index (CD20), a measure of the broader crypto market, dropped 20% as of 13:45 UTC.