One of the worse thing anyone should do in this cryptocurrency world is to panic sell, from my little experience, panic sell can make you loose your hard earned coins for lesser amount you get them or even on almost no amount. So no need to panic sell no matter what, just have a targeted price.
As a rule, panic sales have precisely such negative consequences, however, there are exceptions, to the example of when you sold in a panic and thus managed to sell at a bargain price, while retaining part of your assets.