For me to handle crypto currency regret, you must think this is the lesson that you must be able to learn to be a better version of yourself.
From this you can easily cope in all situations that you will encounter and you can be able to have a greater achievements in future because you already learn your lesson from previous mistakes you have.
I always have a regret but I also think that it's part of the game.
In crypto, while we are trading we also experience losses and profitable times but we should aim to be profitable in the end.
It's impossible to make money all the time due to the fact that we are just humans and we make wrong decisions sometimes, which might be costly to us.