We all have plenty of those, nothing to worry about

You could send them to the graveyard (some address with many zeros I believe) or just keep them hoping that miracle will come one day and they will arise...
I think I saw that there is a project (or a few of them) that tries to gather their members' coins from multiple airdrops worth a few cents each and then actually sell them (because it's quite impossible, plus pointless doing this yourself with coins worth a few cents). I think this is a great idea because anyone who was ever involved in any type of airdrops has such coins, but it's mostly great for whoever is taking fat percentages out of this, not much for people who are sending them millions of coins basically hoping for nothing. But I might consider this one day

Not sure about the name of the project, sorry, try to search the forum.