比特幣 7 月 28 日下跌 3.00%，現貨賣壓與多頭爆倉拖累價格

Bitcoin fell ~3% amid a broad crypto risk-off tape (total market cap -2.83%) and a concentrated derivatives unwind. Forced closures totaled ~$156.5M, dominated by ~$133.5M in long liquidations, indicating leverage amplified downside and increased volatility. ETF outflow and macro-event narratives add risk sensitivity but lack clear, timestamped causality. Elevated spot turnover suggests genuine price discovery rather than a thin-liquidity dislocation.