I saw a user named Romster is making very high bets, almost $10,000 each bet in the Prive Lounge Blackjack 4 game. He was winning 2x in many of his bets and 1x in some. When I checked his stats, he had wagered $668k in just 86 bets. Isn't that crazy? 
Definitely crazy especially when you are someone who is not even earning what he is betting. If you think about it, $10k is an amount that a lot of people myself included would not even think to gamble. If I had $10k, I would use it to pay bills and buy myself some good investment properties. Even if you tell me that I can double it, I am not in the socioeconomic class to spend this much on gambling 
Like everyone is different depending on their income so it’s not surprising when a person use such amount most times you can tell they’re comfortable and doing perfectly fine, I have actually seen people go beyond this amount and they feel comfortable.
We will never know if that user is doing this only for fun or maybe he is also making money through this. Maybe some people just loaned this money and they are using it to gamble. There are always backstory in all of these.