Some don't know exactly when they can consider the price to be low and when they can say it's high; they enter the market with the wrong timing, and when the bitcoin price is retracting and it's in correction mode, they see it as losing money instead of waiting patiently or making good use of that opportunity to use a smaller amount to buy a higher volume; they rush to sell in order to reduce the amount that could be lost, forgetting the fact that as long as you hold, there is always a high chance of getting that dropped portfolio with extra profit attached to it.
They have failed to study and if you actually study they will find a way and even without finding a way it is very much easy when to know when it's high and when it's low because people find it hard to distinguish the one that is worst is when to buy and when to sell, correction mood suppose to be another opportunity for them to actually buy and people want profit but they don't want to lose money that is actually very funny they need to start understanding that as one door closes another one opens that is how crypto works so we have to wait patiently so that we don't have to be, people act the way they understand things and that is one of the reasons they don't succeed because of the kind of mindset they have they won't be able to do a lot of thing and all they need to understand is hold nothing else. A time will come when you can sell easily even at a good price but not everyone is able to exercise that patience.