But nobody will know what will happen with them when they are gambling so that is the most risky thing of gambling.
If you are rich you can indeed gamble but the fact is even if you are rich gambling can still make you poor.
The rule is to always make a limit till you lose a certain amount and than stop.
I would still gamble because if you are rich you can do it for a longer time for sure, the fact is that if you are rich its most likely also gives you more free time.
When gambling is not for making money and only for entertainment, then gambling can possibly accommodate only rich people.
So, there is no wrong in the rich people are continuing their gambling.
Rich people treat it as a fun and not as an source of earning money, they have huge capital to invest and even if they loose it won't make them any difference.