10$ is such a small amount.  For me, I would put that 10$ into Bitbay.  You can accumulate 500 tokens for that.  It has a small marketcap so it has big potential for returns.  It's also a safer investment then most people think, as the dev has been working on the project for years and never abandoned the project.

Another option is just to keep active on the forums and build your rep.  There are projects which airdrop their tokens for free to forum members.