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.
I think you have mixed up the two things. Actually prices becomes higher only when there is shortage of bitcoin in the market. Many people buy bitcoin and the bitcoin ratio in the market gets easy again and prices are getting down because supply and demand are not in much difference. Still, you are some how right that people often sell at panic and they dont have to repeat this next time.