Why not wait for a pullback before allocating purchases, that is EDCA?

Starting to dollar-cost average into BNB from February 2024, today BNB reached a new high, and I decided to liquidate everything. I dollar-cost averaged for 10 months, along with mining rewards and exchanges, totaling about 17 BNB invested, approximately 12,000 or so, with profits in the range of over 30% to 40%. I liquidated everything and will start dollar-cost averaging again, then buy back gradually between 490 to 450. I will calm down and wait. The new dollar-cost averaging will start in December 2024; I will liquidate and restart if profits exceed 30%.