Having infinity amount of money is not possible, but if possible, I will gamble with more money because it is just like water to me. The most important thing is that I will focus on other things more, like building my career and impacting positively to people's life, just as I am impacting to the lives of those that own the casinos.
Having an infinite amount of money is impossible just like you said but for a second let's assume that this was possible then there would be no need to gamble out of fear because even though you lose you'd have more than enough to continue gambling. only category of people that have a near experience with this are rich gamblers, although their wealth isn't unlimited but they don't run out of money easily