In your case with Waves, I think it would be a good idea to cut your losses for now rather than holding and risking that small loss into a big loss.
I did that with some of my WAVES in order to diversify. He's right about not trying to catch the falling knife.
Long-term, I still think that WAVES will be a winner because Sasha did get a fiat gateway up and running (Coinomat). That's the use case that I'm holding on for.