Personally, I can't see myself giving two fucks when I don't care for money in first place. Would you?
Not really the option, but I think it is possible. Because in times when you don't have any problem with money, you can simply think of exploring other things. Since gambling can be found everywhere, I may go there. In fact, even this time, when my funds are still limited, I am already gambling. How much more if I have unlimited funds already?
Without denying the fact that more rich people gamble. Sometimes we think that casinos are like a meeting place for friends. If your friends are gamblers too, that can surely influence you as well.