to me the worse decision i ever make when i sold bitcoin when there was a panic like situation and the price dropped to 500 USD.
Many do same like you and you should now learn from this, when there are panic selling force in market its better time to buy not to sell being panic. Don't go with the majority try to be minority like whales who just grab cheap coins whenever it is available in market. I have grabbed few when price got dropped below 500 usd but not as much as i want.
Yes people easily gets panic when they see price going down and start to sell their coins and big whales take advantage of that situation by buying at the lower price and I think at that point everyone should buy and not sell their coins.