My uncle worked in a bad part of town and, as owner of the business, sometimes worked late. He carried an "extra" $100 bill just for the purpose and, sure enough, he was held up (this is back in the 1960's or early 70's) and it's probably that larger amount of money that saved him; the thieves happily took it and ran instead of getting angry he didn't have "any" money and hurting him. He didn't realize the knife they held at his throat had "nicked" him and there was a bit of blood on his collar that my aunt found when she did the laundry.