Panic sellers are not lazy, they are only expressing their emotions. Truth is that everyone of us has fear, but the difference is that some have been able to master their fear and positively use it. In a real economy, to get high volatility leading to profit and loss case, then we must have the panic sellers otherwise, trading would be boring.
We have diffrent reasons why we sell our coin even the price is low. Maybe there is a need of money like emergency purposes some of them because they afraid if the bitcoin won't recover. In this time, their are few investors who will take advantage and buy those coin in a lower amount that is why they like panic sellers because they can earn more from it.