The problem with a BRICS currency would be that it would only be useful for purchasing imports from other BRICS countries. It would not be convertible into dollars or other currencies. It could not be used to purchase U.S. Treasury securities nor to pay off foreign debt. It would be impractical for use in FDI, even in other BRICS countries. FDI generally involves construction and infrastructure projects, requiring raw materials that could not be purchased using BRICS currency.

The value of a country’s currency is highly correlated with the GDP. Before the Ukraine invasion, oil and gas accounted for about 21.7 percent of Russia’s GDP. By December, it had dropped to 18 percent of GDP. Although the ruble plummeted, immediately after the invasion, by summer, it had rallied, because it seemed that Europe had not found a way to do without Russian energy. Meanwhile, Ukraine refused to surrender, dragging out the war, handing Russia defeat after defeat, and the sanctions became ever tighter, driving down the value of the ruble.