If you hold a cryptocurrency that is included from the red marks from the market then this is not the right time to sell yours. You should buy more now instead of selling it. This is our great opportunity to make profits in the future.
of course we have to predict prospective coins to hold, because if not of course the waiting is in vain. but I prefer to buy coins that are safe like bitcoin, so as to minimize the risk, because I am not yet good at analyzing