Short-term advice: observe and wait. If there is a break below the 85,500-86,000 range, be sure to control your position size, and patiently wait for a new support confirmation or oversold rebound signal before considering phased attempts to build a position.

For long-term holders, you can focus on the "extreme panic" zone for phased deployment opportunities, but be sure to diversify your entries and avoid all-in bets.
Always set a stop-loss line when trading (recommended not less than 5%) to avoid extreme losses caused by flash crashes.