I could talk for a long time about popular coins that have the function of passive income and will bring you profit even if you do not do anything. But to trade now, when the prices of many coins fell by several dozen times - it's a crime. Your crypto-currency portfolio should have been formed somewhat earlier, when prices were higher. Now, in order to save at least part of your funds, your tactic should be - HODL!
I also think it makes no sense to sell when you are in the double digit loss, all you can do is hodl. Of course if you still believe in the project you can buy more to reduce the average price you paid for your token and the future uplift might be higher.