Bitcoin Cash might be big, but it got serious issues on its own as well. Bearish seasons like what we are seeing right now is a normal occurrence in crypto markets, you shouldn't be fazed by the fact that all of the crypto markets are experiencing a dump. For now, it would be better if you hold some of the coins you have that got real potential(remember that patience is the key when investing into crypto) and dump the ones without real potential(and after doing so, keep in mind the lesson that you have learned from this experience: "never buy at an all time high").