"I feel bad being another one of those "I'm not actually one but: people, but:
You know how some landscapers throw bags of rocks with a landscaping ad or business card in them?
Guess what? Some of these are just burglars taking a bunch of pamphlets from a landscaping business, throwing these in your yard. They drive by a day or two later. Whoever didn't pick them up is a much more likely candidate, especially if there was no car in the driveway either time."
some urban legends you have lined up here but from personal experience i can say you want either cash or jewelery, everything else is to hard to take away or cant be sold and 90% of the Jewelery is fake too.
this changes of course if you are a crackhead fiending the next shot.