I think if you have bitcoin and you want to sell it wait until bitcoin price is high or wait until you get the profit you want to achieve because if you sell it directly because of panic you will regret if the price is high then sheing you can not get the maximum profit. but if you want to hold all the bitcoin you have then it is not wrong, because someday the bitcoin price will increase again as the advancement of the times and technological advances that require everything so instant so bitcoin will be needed in the future