Hey there!
A question of panic selling was already discussed on this forum a billion times. But whats bad here? If you are sure that the price will grow back then you can just buy some BTC in better rates. The more dangerous will be the situation when someone is buying BTC while being afraid of loosing some profits despite the fact that pump has already happened (I'm calling it a panic buying). Thats seems like a straight way to lose money and make a bubble.
We should forget about any emotion when we trade.
I would say that both panic selling and panic buying are wrong actions,because people are driven by emotions when they execute such actions.All the buying and selling decisions must be done after proper tachnical and fundamental analysis of the market.
Anyway,all the panic selling and buying made by the newbie traders is good for the experienced traders,because they make profits from other traders mistakes.