Maybe actually stealing it isn't the interesting part. And maybe this is a movie, not an RPG.
But imagine a couple of vending machine maintenance guys, fixing a jammed up Coke machine at the Federal Reserve Bank, they find the coin in the machine - which of course is about the size of a quarter, because of course it is - because some Fed staffer got it mixed in with spare change in their pocket and tried to use it to buy a Diet Mountain Dew.
So these guys have this coin, and... now what?