I would consider WoW gold and Bitcoin to be mere tokens for the virtual economy. You can bind spatial terms to these tokens but those terms can be as optional a

I would consider WoW gold and Bitcoin to be mere tokens for the virtual economy. You can bind spatial terms to these tokens but those terms can be as optional as they are incidental to the exchange, we generally don't care where an exchange originates or terminates. Businesses trading internationally using ships and handshakes created the global economy, individuals trading internationally using sites and tokens created the virtual economy.