If I lose something, I am usually trying to overthink my decisions and to learn from them. Right now, if I lost money, I am doing nothing, because it is too risky to trade to cover the loss and to invest again at the moment, so I am just waiting for better times.
Of course we have to learn from mistakes, most of us are greedy to get big profits so when you keep waiting then what happens is the market drop, then setting a profit target is the most important thing.