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 really think that once you have lost a lot of money in gambling and suddenly realized that you shouldn't have started gambling, you would begin to realize that the worst mistake that you have done is learning how to gamble or not knowing when to stop gambling. Gambling addiction is a bad habit because you can even lose a lot of things, your properties, and even your family.