I can see where you are coming from, but I have possessions that would be considered junk to other people that are worth more than ten times their weight in any precious metal. I would be gutted to lose them. Hell, of all the momentos I have from my time in the Marines, I'd trade all of it for a simple patch. Not because it's especially nice, it's not worth any money, but because it holds value to me because of the people that wore the same patch as me. They were my brothers, and not having that specific patch eats at me every day because I have looked through literally everything I own and I can't find it.
Sometimes memories aren't enough, sometimes it only feels real when you have a physical object to remind you of the people and experiences. The world has literally ended, he was left for dead in a bathroom, and the only person that saved him is dead for all he knows. He wasn't cool with
the Tower guys at first, but they were really his only family. Now he's surrounded by people that will willingly beat him, cut him, and starve him to death just to get information from him that will allow them to kill the only family he has left. It may be an inanimate object to you and others, but I can see his pain.