I think the most common mistakes and problems of the traders are in the patience that sometimes makes them selling their coin too soon. and if they can be patient for a while, I am sure that he can prevent a big loss. the patience is the most thing that we should have and the rest of that list will be following and we can get the profit in the end.
some of us have our own thought why we have to sell the coin that we have for immediately cause for some personal reason and you dont owe this to regret for well this is some of the common cases that we already see for then after that we can say that most of us here dont have patience specially when we see that there is no other could ever be done with the coin that we are hold for.