I don't like equating things to money but I have no choice
   because yes, there's multiple currencies and I can't deny it
   that they're forms of money.

   My 10 yr old nephew with his pokemon cards. Currency.

   Men doing the things the women in their life ask them to in a
   timely fashion: Currency. ["How Much Do You Love Me?"]

   Me typing lots of words to get someone to say, "I understand" or
   "I disagree' or something entirely different: Currency.