Yes sometimes mistakes happen in cryptocurrency trading like wrong order placement, selling tokens early or before the pump this usually happens with most of the traders. In cryptocurrency industry one must have patience and passion to learn from mistake and should have good satisfaction level.
Your satisfaction level might differ time to time. Even you are able to make profits from one coin/token, you will not be able to make with another one. This is a common happening in every industry hence we should not make it a big concern with respect to crypto world.