What are some the more idiotic and stupid mistakes that you know you shouldn't have made but did anyway. Yes this includes other none gambling stuff like sending btc to the wrong address. I'm interested to find out the stupid things other people do. 
I think the worst mistake I did in gambling is that I don't stop myself from being greedy in earnings because that time I am continue earning and winning in dice game and didn't contented in my earnings so I continue to play and dice it until I lose in just 1 blink because I didn't recognized that it continuously lose bet. So that time I realize things.