What most people do
DCA into a position on the way down, take a beating, hold and hope, sell 100% on the first bounce out of panic, watch the impulse/rally from the sidelines, fomo and jump back in near the top, double rekt
Alternative option to save some pain
Wait for price capitulation, wait for time capitulation, wait for a market structure break, start to build a position near the key pivot point/breakout zone, add more in the middle of the move, scale/DCA out of the position when the price accelerates