You can not panic. Panic can lead to very unpleasant consequences, when carelessly to sell its assets at an unfavorable price. By investing should be approached wisely.
but this is really happen in market when many traders see that the price is going down or going up. many of us can not controlled our feeling of panic so its giving a bad effect for our trading and we can not make profit but only get loss because we make cut loss fast before we realize that is just down for a second and then the price is going up for sure.
Panic selling happens often with bitcoin, most of the time users make selling when continuous price increase starts after a short time price staggering within limited range. Possibly every panic selling gets a sudden increase in price.