Let us see how the effect will come since Saudi Arabia has dropped their grip on the US dollar. They're about to join BRICS or did they already? The effect of it won't be in an instant but a change is probably coming within a few years from now. But I think that the USA won't just allow this BRICS to emerge as you've said OP, they're the engine of this world and they're believing that there's no way that another alliance or country should kick them out from their post. I'm in no side of them, it's just interesting to see how these world powers are reacting to each other's move.