As you mentioned losses effect is psychologically, I am agree with it and that's why it's quite complicated overcome losses. Because all logical thoughts become inactive for quite sometimes after lost fund. But the main thing to overcome losses is patience, cool mind traders probably gainer than normal traders who couldn't control emotions. We should explain yourself during losses that we will gain on another trade, so just learn from your past mistake that you have done with lost trade. I know it's easy to say but difficult to do, but fortunately there is no other way. Don't trade a single with your all portfolio funds, at least divide it by four and trade different coins or just hold your funds rather than buy single coin. You may trade multiple coins but more than three isn't suggested at a time  (depends on funds limit) and better play with only couple of your favourite coins.