It's a self reinforcing phenomenon. The more countries free themselves of the dollar, the easier it becomes other countries to do so going forward. Now that BRICS is a bigger economy than the G7, the economic incentives favor it for countries that are forced t chose between these economic blocs.

Yeah, that's the impression I get as well. That seems like the most likely scenario to me because I don't think any BRICS countries would want to have a single country's currency replace the USD. Having a Bancor style currency that's used strictly for settlement and not owned by any country is a much more palatable solution. Especially given the tensions China and India have.

and not a currency for everyday transactions.

For now 😌🙏