$BTC daily close failed to hold above the 80,000 psychological level, with an early morning low spike near 77,650. The 80,000 level has shifted from support to short-term resistance; if the rebound cannot quickly reclaim this level, there remains a risk of continued downward momentum. Key support to watch below is the 76,200-77,200 range. The 24-hour trading volume is about 8.8 billion USDT, slightly shrinking compared to the previous day, with no significant spread of selling momentum.