Panic sell or buy is big problem for every trade and they always trade depend with other information, when some one make fud or fomo never allowed your self control by them. Keep on with your confidence and never give us them chance to make you panic, basicly you need to control everything when price dump keep hold it if you buy good and potential altcoin, but never heard with something big or anything if you got the coin have pump almost 60% until 100% to buy because very risk and you will loss your money when coin raise all time high but keep to buy.
I never depend on other people's information when I start my trading, because now it's very easy to get every information needed if the problem is only about trading, but if the problem is only because of panic, it also depends on how to control and react wisely when there is new information whose truth is still not accurate or proven, so panicking is clearly pointless.