1. A method, comprising: tracking a physical position, in a cash supply chain, of a monetary package of a selected party, using a computing device, the monetary package containing one or more physical monetary items; predicting, using the computing device, based on a transaction history of a selected party, an expected future change in funds for the selected party; creating a funds estimate for the selected party at a specified time, based on the physical position of the monetary package in the cash supply chain and the expected future change in funds, using the computing device; and storing the funds estimate in an electronic medium associated with the computing device.