Take a good look at the coin and the company/product behind it, some of these coins can be 0.00 
if you think it has some future then keep it and see, probably wont be too much worse than now!
There are likely chances of suffering of loss for someone who is there in the world of the crypto currency and that in case you suffered some loss, then there is nothing to be worried about and that you need to stay there in this world of crypto currencies for more period of time in order to recover your loss. Quitting of this stuff will never help you in recovering of that loss and that you need to work even harder for that. if you think it has some future then keep it and see, probably wont be too much worse than now!