Dead coins will never be profitable and gain their value back so most likely they are bound to trash. Clean your wallet so you can focus on the new potential coins that have been making profits in the market and as much as possible, prioritize bitcoin more than altcoins. In this way, even if your coins are dumping because of some price corrections but you won't get much affected because you are not holding anymore those shitcoins.

I prefer to forget all my losses with my dead coins before. There's no way i can regain all my losses back then. This time, focus on bitcoin and altcoins that have been more established and more productive in the market.