[butlike]

On the US Mint Site I was just looking at the 'Medals', where you CAN have a living person minted onto what they call a medal. Unsure of if it's the same size as a coin, but if it is, you could conceivably try and circulate the medals of living ex-presidents (to great cost to yourself).

[RobotToaster]

The main difference between a medal and a coin is that a coin has a face value issued by a country.