If you are afraid of not holding on, just open a short position.
Holding a short position can make you unafraid of falling, allowing you to hold onto the long position on the other side instead of rushing to sell. The so-called take profit. Many coins, once sold, can never be bought back. Even if they drop, you want to wait for a lower price, and when they rise, you don't dare to buy, ultimately missing out for no reason.
Those who boast about buying at the lowest and selling at the highest every day are just scamming for copy trading fees. Their skills are even worse than yours.