Fear . I think this is the problem most traders encounter. And my self is like that, the time when I first invested I lost a lot because of this. And now I have improved it.
what kind of fear do you mean?
because maybe someday I will enter the trade also later, therefore I also need to learn.
Someone can correct me but I think it is the fear of trading itself. Since we all know that trading involves around risk, you inevitably trade most of your resources and hope that its price may increase today. I believe, that is the fear thay every trader must conquer in order to maximize profits.
In my opinion, most traders do not consider and observe the market whenever they do the process. They subconsciously trade resources without having to consider a lot of factors to minimize risks. Lastly, most traders invest everything without having a contigency plan if their investment lost. This tends to leave them lost and bankrupt.