You say $BTC is crashing and you have to sell now, so you sell, your family members are selling, your friend sells, your neighbour is selling , remember trading is a two way game, who do you think is buying everything you all are selling.
I will not tell you its wrong to sell because its actually not, but don't sell because you are told to or because everyone you know is doing so, sell when your analysis says so or you've reached your target.
Trading is your choice.
Happy trading and investing.