If you had to choose one I'd definitely say trading, it may take you a year or two to get right but once you can start to see the data as a picture, it can be a really valuable asset. If you're bored however and just want to fill some extra time, bounties aren't a bad way to go about it, but just accept the fact no matter how diligent you are, you will run into scams and either won't get paid, or you'll get paid and the token will be valueless.