Of course money is a kind of medium.
Literally, as KeithHart points out. National money is a story about the country. On the one side of the coin or note you have the king or emperor or president's head representing political authority. (On the other you get some picture that represents TheNationState such as typical people, regional dress, wildlife, national writers or scientists etc.
DouglasRushkoff : http://www.rushkoff.com/20040601_archive.php#108725830462026477