I have seen many persons come here to lament of them losing one or two funds in trading which is very obvious and need questioning of how and where they learn there own trading skill from. I have had of a crypto traders that lost all his funds in one day because of market volatility. This happens frequently and I think there is need to recall where the cause could be from.
Losing one to two funds is I think still considered to be a normal thing. Not only noobs but even the pro one's can also experience it. I think there is no need to question this. You can ask if where do they get their skill or where did they learn trading and if they respond to you that they learn it from the best sources only, what will you respond? I guess you will be angry towards them because why they still lose.
as a trader, losing one or two trades is part of the game but sometimes losing everything that had been accumulated for weeks, months is very painful and there is need to know whether it's due to ignorance or insufficient trading skill. Acquiring sufficient trading skill is very important in trading which can also help to get good results.
If they lose the money that they acquired on the past, that simply means that they are greedy and don't have a self control. What else will you want to know? I think this isn't what you call a lack of trading skill because if they lack of trading skill then how can they earn some funds before? consistent losses in trading should not be questioned anymore but that can be a sign that you need to change your career. You need to quit trading or else these loses can grow more.