In such a scenario, what would you do? Keep "holding" until the coin comes back to life (revival/relaunch)? Erase all of your wallet data (private keys, seeds) and forget about everything (burn)? Or simply give it all away to someone else?
You will have those useless coins coming from your investment, airdrop, and bounty hunting. I have a lot of this shitcoins coming from bounty and airdrop, but its part of the game; you have to live it up because of the uncertainty and volatility of the market. The ones that will hurt the most are those coins you invest in and hope that you will make a good profit.
I just let them in my wallets. I'm not doing anything; we never know. These wallets might qualify from airdrops because of age and activeness.