I guess investment safety shouldn't be a problem as we have lots of reputable casinos here.
Here are some example of bankroll investment results that some members have shared in the past
According to the data most casinos are offering a steady profit that varies between 20 and 60 percent a year. This is extremely good compared to the average bank rates and if we add that bitcoin gains value over time you're getting at least additional 20% on top of your crypto investment.
For an average joe that gets some profit from his signature campaign and can invest it in the same casino that pays him without having to move the funds this is a great opportunity as long as he trusts the casino not to scam him.