I think the top reason why traders are failed in trading is greedy,inpatients, lack of knowledge and no have yet experience in trading.I know that trading is basically buy low and sell high.but not just to think.it needs to view the project of you're coin that you trade that's why many traders have loss.its just because they don't know the project of coin if good future or not.
Most of the traders today are failing because they are all impatient, most of them tend to sell their coins at the lowest price when the market is dumping its price and from there they are losing a huge amount of their investments.