I work for UPS as a delivery driver. You are shit out of luck, UPS isn't going to pay a claim on cash. Also, there are so many pkgs. going through our system, no one could have selectively identified yours. It is so easy to ship anything you want through our system w/out getting caught. If it was packed with any care what so ever it should've made it. Did you send it in an express envelope? If so, the only thing I can think of happening is it got caught in one of the conveyor belts or slides and ripped open, then someone got their hands on it. Or another possibility is the label became unlegible and a clerk opened it to see if they could find an addressee listed and they took it. Sorry to hear about your loss, unfortunately there are dishonest people in every workplace.
Later