If Bric is coming to the digital currency, it won't work out because it will be a centralized digital currency that will be controlled by the supported countries and if it is for the formation of the regional currency to eliminate the US Dollar then they might succeed because what they are planning to do is to use the agreed currency to trade, buy things and pay goods and services. Then it will work out and they are winning more countries to the economic block.
Great idea, but... There's still the question of implementation. Moving away from the currency of the international economic system, the dollar, has several consequences:
1. isolation of the BRICS economy, or correctly - self-isolation from the world economy. The reason is banal - 70% of the union members do not produce any products important for the world economy.
2. At the same time, China and India almost entirely produce significant products for the world economy. But they sell them for... DOLLARS. Why ? Because India and China need goods from the "outside" world economy, and there the settlements are for freely convertible and recognized currencies - mainly dollar, euro, yen,.... but not the yuan.
3. another reason - who and how will control the "single currency? Well, how can China and Iran, for example, equally ensure the value of the single currency? The answer is simple - they can't.
4. China will strongly push YUAN as the single currency of the union. Directly or indirectly, Yuan or CBDC Yuan.... Or it will demand to give China "Exclusive Rights" because it is supposedly the "second economy of the world". China's goal in BRICS is "Chineseization of BRICS", it is enough to look at the colonization of African countries to understand what China will do with "raw material appendages". But China's dominance will be countered by ... INDIA. Which chooses the Western vector and qualitative relations with the world, rather than self-isolation....