 memories attached to them because he bought them when he traveled and things like that so yeah that's cool nothing wrong with that at all and no I would not call it horrible or childish or something like that and if you do it properly as you've discovered they do go up in value and you may take joy in turning the whole portfolio over every so often and that's fine but I'm just going to call it a hobby that works and a collectible that works because collectibles you know art should go up in value