That's exactly what I said previously as a reply when someone suggested they would hold on to the paper wallet for a year and if the original owner doesn't move the coins, then they would consider them as lost and take them. But we can't put such flags on bitcoin UTXOs just because a similar law exists for some other assets or physical objects. For example, items from the Lost & Found at some airports are stored for 6 months, after that they get auctioned off. We shouldn't use the same logic with bitcoin. For all you know, I might have been incapacitated to check on my coins in that one year period you decided to give me.