Key takeaways: Bitcoin’s sharp rebound after Jackson Hole fizzled into a bearish weekly engulfing candle. Onchain data shows $105,000 as the key support as mid-size wallets sell. Seasonal weakness and spot BTC ETF fatigue raise risks of a drop toward $100,000–$92,000. Bitcoin (BTC) posted a sharp rebound on Friday, gaining 3.91% to $117,300 from $111,700…