I see you have already tried various things around blockchain. I would suggest stick in that area and go deeper, you probably have some knowledge there and the prospects could be huge.
Even though the entire field is kind of in a knockout right now, I believe the technology is here to stay and the early adopters that make the right choices will reap some serious benefits. I'm just a newbie in these things, maybe you know more than me, but I am a programmer and I know that the tech itself is very promising, at least from what I've seen and researched.
But you probably don't need convincing since you're already into this.
In my opinion, the deeper in the tech you go, the better your chances are. Trading is probably the most risky thing you can do, though it might be the easiest one, I mean you just throw money in it, right? Try blogging about your experiences maybe, it's one level deeper, so it's kinda harder, but you will own a resource that people might want to pay you money for, and you won't be risking money at least. If you have the required skills, I'd say even go for creating your own dapp or currency or exchange or whatever, that is the hardest of these by far, but also the potential rewards are crazy.
My point is, it is an exciting field with a lot of things going on, and since you're already in it in some way, investing further in your knowledge may be a smart move.