People do miss out those opportunities and ended up on having those regrets. Just like been said that learnings do comes from in the end and not from the start.
With those experiences that you are able to encounter. You would really be finding yourself that be able to learn from it on which on next time
then you do already know on what you should gonna do on such situation.
Greediness is one of the common problems here. Many people missed the chance because they thought that there was more and declined to sell. Honestly, only a few get into it because this kind of mistake still exists. I think, most of us are still emotional and too optimistic which is not good anymore. We need to learn how to analyze the market situation and keep in mind that not all the time we need to hold, we also need to sell when prices satisfy us. Making a high target is not a good practice but rather make it achievable so we don't miss some earning opportunities. We need to think and I think at least having 5-10% ROI is good enough.