Trading crypto has always a risk and even if we are expert in trading there are still time that we will lose because of some reasons, it is because it is normal to human that even if there are earnings they still want more or big that is why they end up losing they feel that the earning or profit is still not enough they wait for big profit that sadly didn't come until all funds are lost including the capital, that is why in trading or investing we need to set a limit for us to earn and control the greed.
Even though they have good skills and experience in trading, they will certainly make mistakes when trading which makes them lose in trading and indeed this is very normal either because of their greed or because of their mistakes in analyzing the market which results in losses in the trading they do. , so it would be better, even though they already have a lot of experience or skills in trading, it would be better if they could still update their knowledge about trading so that they can still trade and make a profit, setting limits is easy to do, but if they don't carry out well the target will be of course they still fail and we must continue to practice all of this so that we can get results according to the targets we have set.