Vivendi Universal is french, they own blizzard, blizzard runs WoW, that's billions of dollars in virtual goods. One of which is a virtual currency. Dofus comes to mind as well, that is distinctly french. Anyway, if the bank holds accounts for these people, they should have to hold accounts for you as well, non?
No, third parties do not accept the currency as means of exchange, WoW gold does not meet the definitions.