if I were rich, I'm not going to gamble. I will use my wealth for more useful things and go on holiday with it to get pleasure
And don't forget to make more money out of that money!
Because anyone may get broke by just spending money without an income.
That is a completely different topic whether rich people should invest or just sit idle. The thing is that he will not gamble if he was rich that means he is gambling for money and that is not a great sign from a gambler. In my view, anyone can gamble but should not invest more, like that could change his status from rich to poor.