According to CoinMeta, Bitcoin fell below the psychological barrier of $77,000 on September 10, hitting a low of around $76,748. Investors' expectations for another interest rate hike by the Federal Reserve surged, contributing to this decline. The latest U.S. Producer Price Index (PPI) showed that wholesale inflation in August remained higher than economists' forecasts, with a year-on-year growth rate of 5.4%, slightly above the consensus expectation of 5.3%. The market expects the Federal Reserve to raise interest rates by at least 25 basis points at its meeting on September 16, and CME FedWatch tools indicate that the probability of a rate hike has risen to around 70%. In addition, Brent crude oil prices broke through $100 per barrel on Thursday, further increasing pressure on Bitcoin. Meanwhile, traditional markets also showed weakness, with the S&P 500 and the Nasdaq Composite Index falling by about 0.6% each.