I don’t know the better way to earn good money besides mining coins. Trading is too risky thing that require smart mind. All these investments this is just a lottery. There are many scams everywhere.
But you can try to participate in some bounty... maybe you will be lucky.
Hmm, as I know, mining has a worst ROI. You dont find mining risky, you still need to invest to hardware. Most of miners says, that market will crash, they will sell hardware. But who will need all those miners???
P.S. Im professional investor myself, just looking for some more stories from people, where they found their success.