There are a lot of gambling sites which are a scammer and those sites who offer investment plan like a Ponzi is too much risk, we should avoid those types of Ponzi scammers.
There are casino's that are coming out like this but if a legit casino offers bankroll investment, don't think that it's like this. There's more for these casino's to tune in because they are legit operating and most of the investment opportunities they offer are all legit.
Reminder: this is for those casino's that are reputable.