Investing in this space is just as shit as gambling because you're just giving money to anonymous scum and hoping they don't rape you.
That's the trick. You need to estimate the risk of getting raped, confront it with possible gains and decide whether it's worth it or not.
There is no such thing as risk-free investment.
You won't see it in investment forums, as gambling is not considered an investment. And gambling is a legit way of increasing your coins (unless illegal in your jurisdiction), just not particularly the smart one.