But now I'm curious, how many casinos out there can actually provide the funds in the unlikely event that all of their users decide to withdraw? Or how many casinos out there that are also secretly using their players' money for investment or marketing or something else?
I do not know if a serious casino would choose to do this, as it presents too much of a risk.
While it may sound like the best of both worlds, in practice this could be a disaster for any casino that decides to take this path. Casinos have their core business, which is making money from gambling. Using player funds for investments in other ventures is not something they would normally do. However, if they did so, they would need to make sure the investment was safe and profitable. If the casino loses money on its investments, then it will not be able to pay players back their deposits. Therefore, I do not think that this is a very likely scenario, as it could result in the casino going bankrupt.