To me this depends on you as an individual.

My own answer is Full time crypto trader. Last year between 13 August 2017 and 1 November 2017 I made 4 Bitcoin trading part time.
My initial investment was 450 Doge Coin on 13 August 2017.

So for me, I would take trading first any day. But not everyone will make as much. Crypto trading requires that you are ahead in the markets.

Bounty Hunting has no risk factor. So I would suggest the following:
Hunt bounties to gain some capital. Trade that up. See which system works best for you.

I also like the activity of trading more than I do bounty hunting, so really to me trading wins.
If you never invest any money, there's no risk...