Money is a good that acts as a medium of exchange in transactions. Classically it is said that money acts as a unit of account, a store of value, and a medium of exchange.
As per the Economic Glossary
This includes gold among other things - the article does not encompass what is NOT money other than credit cards.
From Wiki lol:)
http://en.wikipedia.org/wiki/Gold_as_money
Excerpt:
For all of recorded history at all times and in all circumstances gold remains money. Thus Gold is the ultimate form of payment. Interestingly, as evidence of its monetary nature gold is the only commodity produced by humans to be hoarded.
