Aside their value their money, they have huge funds for them not to cling on gambling to win more.
For me this is how it is, of course a millionaire or rich person takes care of their money to the maximum, I have seen that some people are selfish with themselves, that is something that I do not see well either, however they take care of their money so much that they know that in casinos money is Easily lost and that hurts them a lot, in fact that is what all of us should learn, at least think a little more that way.
They may need the money for gambling, but they are not greedy or desperate to get money from it. Rich people already have money, and if they gamble and lose, they can easily stop and come back another day. One thing about people who don't have money is the way they reason about it.
Anything they understand can give them money; they believe they can make a good amount of money before taking a rest. For someone who doesn't have money, they are ready to gamble to ensure more money is gained from it, but it doesn't work that way. Most people don't understand gambling the way rich people do.