I have a few coins I earned from doing bounty campaigns last year and they're pretty much useless since its worth is only like less than a dollar. I don't wanna just dump it because I worked hard for it but I can't exactly sell/trade it either.
So my question is, is there anyway I can still make use of these coins?
As you have said, their worth now is not relevant. So the only use of it for now is merely a display on your wallet. Hold it since you can't sell it for a good price. That's life you need to accept it.
Most of the bounty hunters are in the same boat as you are, i bet some of them token become worthless because of the crash, it happens also way back when bitcoin hits the first 1.5k usd and went back 150USD thats how dangerous crypto is when it comes to financial, you can hold or trade to increase your holding while waiting for another jump.