Even If I were rich I would still gamble. Gambling is a form entertainment, if you know how to control yourself. But I would only gamble on poker which not solely based on luck but on skill.
If you are good in poker then you should try your luck on it, and I think if I would be rich I would have gambled a lot, as even if I loose I won't care as I am a rich guy
Poker has a great deal of talent and skill behind it, you need to spend a lot of time trying to get better to get positive results, but if you are good you will excel and become world champion, this cannot be said for classic gambling, you can't compare, so if you are rich and good at poker it's a great idea actually.