Bitcoin dropped below $77,000 on Thursday following news of a Binance hack that Chainalysis estimated caused $5.91 billion in losses. Ethereum fell into the low $2,100s, while XRP and Dogecoin also declined. Binance said funds remained safe and the exchange was investigating the cause. Coinglass data showed nearly $1.5 billion wiped out from the cryptocurrency market over the last day, including $1.3 billion in long positions. Analyst Ali Martinez identified Bitcoin's 200-day moving average near $73,000 as potential support, not a guaranteed bottom.