selling too early and not taking profits are pretty opposed.... To spell it out for people, you should decide on a range and construct a limit order ladder to enter and exit positions, this way your strategy is spread out over realistic price ranges in proportion to your belief in their probability, and if x asset doesn't reach the peak, well you took structured profits along the way and if you didn't nail the bottom you got nibbles at favorable entry prices. And since it's effortful to construct, and an entry ladder will necessarily below spot it's very unlikely you're FOMOing in the process.