Gambling is risky and investing in a bankroll is a much riskier. Now having other people to access your wallet is not a good idea but if you want to take the risk, then you might hit a jackpot like when you gamble. Anyways, I found your idea a must try one.
I disagree that investing in a bankroll has more risks than gambling. Investors are recommended to invest big just to receive a better profit share and there's a couple of risks to it like the possibility of the casino stealing the investors funds but that's unlikely on trusted casinos. When you invest on a bankroll you're not giving access to your wallet from my experience it's more similar to lending without the exact dates and interest.