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