The problem is coming up with an agreement specially with weasel regimes like the Chinese who want to force Yuan on everyone replacing the dollar and nobody wants that 
It is impossible to predict what they'd do in the end.
It is impossible to predict what they'd do in the end.
I don't think any BRICS member would want to be linked financially to each other with one currency. These countries are all very authoritarian in their own ways and I don't think they trust each other that much
Imagine the king of Saudi having to trust Iran with a single currency. I don't see that happening.
Why would Brazil want to be linked financially to say, Iran or Russia in case of sanctions or wars or something that has nothing to do with them? No thank you.
i don't think they trust anybody in their group but they were mixing all their assets afaik but not sure who will hold their assets and they come up with the currency BRICS as well. just like Europe where they have EURO. maybe its true that they will have their currency tied to each other.
however i don't think they are interested in new world order, they just want to be independent in finance and economics since most of these countries were sanctioned by US and if they can work around on their own means they are free from US sanctions.