It is of course risky but without taking risks you cant also earn some money.
every investment comes with a risk. So there is no sure 100% that your investment will earn money. But you should be looking at how risky are you willingly to take to earn certain percentage. I am able to put my money in a bank and it is very safe +stable but the 0.1% is turning me off.
Money in a bank is not an investment. It is just a saving and you don't expect it to yield high interest. Just save the money you need for emergency. The other money, youbput in investment. Casino is a good investment. It can yield a high interest, just be sure that the casino is a stable one.