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?
Your input would be greatly appreciated. Thank you.

If you bag a coin, and the coin ends up to be a dead one, the only thing that can be done at that moment is to keep on holding, you can’t sell a coin that doesn’t have value, and you don’t have to erase all your coin, if you are holding the coin in your wallet, it’s not going to affect you in any way, a dead coin might end up rising in the future, and if you have disposed the one which you are having, you will be the one to end up regretting later in the future why you disposed the coin. This is crypto space, don’t always completely give up on any coin, anything can happen.