Tell that to Gadhafi! Oh wait ...

Anyway, there's likely going to be a variety of changes occurring all at once. This BRICS basket (or maybe it is just a RIC basket) doesn't even need to be adopted outside of the small set of countries participating for them to be displace the use of the dollar for cross-border payments. Bitcoin may even play a part in that (as the method to swap between the local currency and the currency basket), who knows.