SEll your crypto and then invest again in the lowest possible market price for the crypto after the huge fall down. This is another way to earn more crypto even if market price is down. IT will not matter on the equivalent of that crypto to fiat even if it means that after the huge fall you can lose some of your money. This strategy is a better way to increase your crypto.
Just do what i did, i sell it. Its not panicselling i am judt afraid that bitcoin will continue to fall and continue to drop the price, if that happens i will lose large amount of money, so i decided to sell some of my bitcoins and then i just hold the other and i will sell it when im already satisfied with the price in the market.