When it comes to gambling, I don't think we can have it enough, both to fun and to win a bet, things cannot be the same as for us over time in gambling, the more we are playing the more interesting it becomes for us to have more time in playing and having fun in it, while if the opportunity for winning also comes, we can't still afford to having it enough than to keep coming.
Humans are not always satisfied. It's not just in gambling; we can never say this amount of money is enough for us, and we need to stop, but we can only try to control our greed and stop gambling even while we are willing sometimes so as not to fall into the trap of losing control and the greed leading to massive loss.