the worst mistake i made is greedy. play again and again after winning. and at the end i lost
I feel you dude, the moment when you're winning and greedy strikes that lead to a great loss. Sometimes when I'm playing dice and I'm winning I wish their will be a brown out to interrupt the game to save my day from lose

. By the way, lesson learned from your mistake that next time remember to control your emotion when you play.
All of us have a worst mistake in gambling. Especially who are addicted in gambling. And one of the worst mistakes you can do is to bet ALL your remaining money then after all you lose it in the end. I actually reading lots of experiences here in bitcoinforum that I can actually learned a lot with their mistakes. So I think it is better also to read a lot for you to know more about losing and winnings.