As I have seen this already too many times since past few years, I believe it would be beneficial to share my experience with crypto markets. Do not sell your coins/tokens when the market is dropping, it's just a pure speculation and perhaps market manipulation from whales who only target to earn on whatever the price moves they can achieve. If you're reasonable, sell when market is high and buyer/hold when market is bleeding. I hope this helps you to decide 
Sometimes selling crypto can be useful or say crucial like, for instance, an emergency with family and whatnot. Or maybe a need for school works and funds. But the ideal way is to not sell it indeed, as we need to earn and thrift for more, thus saving huge amounts of money as we sell it on the right time. It depends, really.