Trust is a sensitive issue, unless you know the operator's real name , address and other few personal information then you cant "trust" that person literally . There has been many cases in this forum that few most respectable and trusted member decided to scam just for their personal reason. Money changed person to do unexpected things for sure
Well its a risk when it comes to investments anyways not only with casinos. And that's why we have to be a bit more careful and research about where we'll be investing our money on. We try to research on backgrounds and feedbacks of casinos that we're looking at. The risk is still there as as you've said, there's the scenario wherein the top people in that site will suddenly make it personal, but it's still way better than you playing in a casino.
Right instead of playing gambling and losing your money better you can invest that money in any popular casino website and earn money. But this is not an easy job, and you can play gambling for fun, but trading is not fun. You should be very careful, and you keep on checking the status of your investment sites. If you do any negligence in this if you have bad luck, you have a chance to get loss in investment. So this is a good but risky job.