If you are extremely rich and you can just gamble up to your heart's content, does the novelty of winning wear off? Like would you get tired of gambling since there's really not much risks because you can gamble with any amount and still receive little to no consequences?
If you get to that point, you are probably just gambling trying to find that thrill that you initially got on your first big win. BTW, you will never experience the same thrill IMO. You'll start buying things that you don't need, just walking in a store and impulse buying everything. Start seeing your money disappear and then start gambling again to try and make it back. If you can, you restart the cycle.
Most people don't play smart with their money and look for an investment to keep your money growing.