It doesn't matter if they are rich or poor people could still get addicted to gambling it only depends on how well they could control it and how much they could spend on it.
For me the only difference is the amount that they could risk in gambling.
They might not be addicted to the profit or gains but the feeling of winning or being a winner hitting big or something else.
Rich and poor alike have the same goal when betting - they hope to win the round. Some say it's for fun - some say it's for experience, but they really want to win. They spend a lot of money on gambling - even if it doesn't have much effect, but they honestly don't want to lose it at all.
I remember how Neymar and all the other rich gamblers reacted when they lost - they were disappointed even though we could still see the smile on their faces afterwards. Rich gamblers are able to rise because of their financial strength - while poor gamblers will try their luck again and hope their finances can recover.