I think you should do both, if you have free time doing a few bounties doesn't take a lot of time or effort. I think it's very important to invest at least something as well, the market is very unlikely to get any cheaper than it was a week or two ago, and the sky is the limit for how high it can grow. Pick a few projects you like and just go for it. For me, I'd be wasting the money on something sooner or later so I may as well invest it in this, and I've had lots of success.