A loooooong time ago, I worked in convenience stores, and late at night we were required to keep less than 40 dollars in the register. If someone needed more change or bills that we didn't have, we could "buy" it out of the change safe, but that would only dispense 10-20 dollars every 30 minutes.

The point here is that doesn't really require much money to be a target.

I got robbed twice over the course of a year while delivering weed (cash business) in California, I imagine pizza people face similar hurdles. Can't wait for cash to die personally.