I feel like this is a dumb thing to say but if I was a thief, I'd take the good stuff and then leave the rest somewhere where it could be found.
Like... if I was going to steal a wallet or purse, I'd take the money (and credit card I guess?) and then leave the rest of the stuff somewhere so it could get returned to the person. I mean, I don't see the point in stealing something like a bag or purse and then keeping it all. No way you need that person's used lip gloss or tissues or the photo of their dog, you know?
(I've been watching a show where bag thieves take bags at a beach and I just want the tourists to get their stuff back!)