It depends on how you describe success. I consider gambling mostly as fun so I don't have a pressure on winning at all costs. Besides, I'm only using my free coins (FuturoCoins to be more specific, cause Futurobet, casino where I'm playing, is the only one which is supporting it, alongside with Bitcoin) to not be afraid of loosing too many money.
I used to gamble a lot, but i'm done right now. It was fun at the beginning but after a while i noticed that i spend too much time (and money of course) on this and i decided to partly let it go, i still have an account in futurobet affiliate program, just to have some passive income. The only gambling i do from time to time are sports bets , cause i am huge fan of english premier league and bundesliga - it's gives me a lot of fun to place bets with some of my mates and friendly laugh each other at those who lost and of course the tension during the round is more prominent