So far, there is no information about any new currency for the BRICS countries. Moreover, the very financial bodies of this organization still object even to the planning of issuing a new currency to serve this economic union of states. Therefore, this is still nothing more than talk that has no serious grounds. Judging by the fact that this group of countries does not include the most developed countries, they will not give up some strong influence on the world economy. But everything will depend on the format in which these countries will work and what their goals of cooperation will be.
If we imagined that countries that have practically nothing in common, except for an ancient article that used the acronym BRIC, create a common digital currency, then why? None of these countries has expressed a desire to abandon the national currency in favor of any other, moreover, they are now actively engaged in the regulation of their own currencies. There were no global decisions on the part of the entire BRICS, it is still bilateral relations between different countries. Accordingly, it is clear that there are no real prerequisites for such a common currency to succeed, so it would hardly be created. No need.