Yahoo Finance analysis indicates that Bitcoin fell to $77,300 on September 12, primarily due to three factors: the August core CPI data, released on September 11, exceeded expectations, pushing market bets on a Federal Reserve rate hike on September 16 to 83%; US spot Bitcoin ETFs experienced net outflows for the fourth consecutive trading day, with $13.29 million flowing out on September 11; and long-term holders sold 539,000 Bitcoins in the $77,000 to $80,000 range, creating a stubborn supply barrier. Additionally, Brent crude oil prices breaking above $100 per barrel on September 9 also contributed to the higher August CPI data.