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 
Thank you for the tips.
I totally agree with you.
Especially for the one who invested some money and willing to lose some money because afraid when the price is falling.
Well, it might be different case if you sell because you already aware that the altcoins you investing in is a scam.
Best thing, do the research before investing, then you will have a baseline of their expected vaule and etc