Holders get more profits because of the panic sell, actually bitcoin has proven it from a similar incident like this, where there was a decrease and then bitcoin prices rose higher, I think this is a familiar thing.
In my opinion, there is nothing more profitable than that of holding your bitcoins in the world of crypto currency. The only thing you need to have is to learn how to control your nerves and remain patient.
Patience is the only key if you want to earn a good amount of profit not only in case of holding but in other case as well. If you will lose control your nerves and will go for panic selling, then you will get nothing but loss.