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. 
Most of the time the most reason that a person will do a worth mistake in gambling is overplaying and trying to win back the loose money that he/she bet. This is the most idiotic and stupid mistake most people do, they don't think how much they lose more when they bet more and more so that they can win something but they just end in overspending on betting over and over again and go broke. Gambling should not be recommended and casinos or online gambling should put a restriction on how much they can spend or deposit because there are many people who get addicted and go broke into their entire life. My biggest mistake while playing gambling is when I risked all the money I had won. At that time I had played gambling and managed to win a lot of money. But I became tempted to get more profit, I want to profit twice that time. But when I want to bet my money, I raise my income to 2-fold, and it makes me more profit and more loss. Unfortunately, as I started to gamble, I experienced more defeat than profit. Finally from there I learned not to raise the bet in one day. Although I'm tempted to earn more profit, but I will still bet on the same number on one day.