The U.S. Empire may be straining, but history shows predicting when an empire will “collapse” is a fools errand. US Empire could collapse in 10 years or 100 years or 1000 years. No one knows.
And it’s only mighty challenger: China has a rapidly aging population, lack of babies being born, lack of immigration, its bond yields are rapidly falling due to deflationary concerns, its population is hoarding cash, and it has a huge real estate debt that it’s working thru. The Yuan is becoming more volatile. China looks more like Japan in 1990 than a mighty power poised to dethrone the U.S.
So Plus explain how BRICS can position alternative currency? Russia and Brazil currencies are doing awful. China has strict capital controls and has a peg on its currency which stops any BRICS currency dead in its waters. India and China are major rivals and India would never use a floating Yuan as its reserve currency.
So the idea BRICS can position an alternative currency is from people who don’t understand basic economics. Trump being one of those people.
The best BRICS can currently do is trade in their local Currencies for major deals, maybe crypto as well, and hoard gold to prop up their fiat currencies if one day EURO/Dollar go into the toilet.