Bitcoin dropped below $81,000 early Thursday, down over 2% in the past 24 hours, after Wednesday's US inflation report showed consumer prices rose 3.7% in September, exceeding expectations. This data reignited concerns that the Federal Reserve might raise interest rates this month, with market bets on an October hike briefly spiking to nearly 50% before cooling to around 30%. Other major cryptocurrencies like Ether and Solana also saw declines of 3.5% to 4%.