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?
Aside from money, there are more things that come with winning. Joy, satisfaction, fulfillment, and so on, in short, winning is packed with emotion that is somehow addictive to people. The novelty of winning never wears off since people always look for such a feeling regardless of how much their financial capacity is.