I understand. Some thieves are smart enough to case a target before trying them out. That is, qualify them as a worthy enough asset to make it worth their trouble. Dumb crooks are frequent, but for the ones who know their stuff, they can be a real problem for someone with enough material assets at hand.

It pays not to advertise. Career thieves don't target poor people much. Stupid ones do, though, and they get caught. Again, you can't fix stupid.