, there is no casino who have been on bankrupcy by lucky gamblers, cuz they can't be how gambling sites are coded.
In fact there is some in the past that went out of operatin because player won huge amount. When a site lose huge amount that means the investor is probably going to be scared about losing more thus some will divest. Well it happened in the past , moneypot was a good example of it and I guess they never fully recover that big loss
In between investing in BTC or real life casinos, I think is while better to do it online, since we cannot know if the site itself is not scamming by having algorithms to make people lose.
You wont be possible to invest in a land based casino, they probably has millions of dollars minimum