More importantly: The coin & currency tracking data maps FAR TOO CLEARLY into reasonable commerce patterns, coins into and out of *registers*, bank trucks and storage. Without a full 3d model and a huge computational effort to simulate global commerce, it is more likely that a high precision radar system or sigint capability is actually tracking these targets.
*coins*? I could imagine RFID-type tracking of bills. What I can't imagine is how you'd ever manage to track metal coins in and out of a cash register, unless the *register* itself has embedded analog signint pre-processing. If it's worldwide, I can only imagine consistent data if acquired by satellite, so it's got to be some frequency that propagates relatively well, with some sort of passive radar[1] type mechanism? Or is this why all cell phones have FM receivers now?[2] [1]http://www.defenceandsecurity-airbusds.com/en_US/web/guest/passive-radar-fro... [2]http://www.opb.org/about/connect/mobilefm/