The BRICS project to create a common currency is generating growing interest among economists and analysts, as it could redefine global financial balances. For decades, the US dollar has dominated as the main reserve currency, giving the United States substantial economic and geopolitical power. During their summit in 2024 in Kazan, Russia, the leaders of the BRICS intensified their discussions on establishing an alternative called "Unit," designed to facilitate exchanges within the bloc. This project fits into a broader strategy aimed at reducing their dependence on the dollar, in the context of increasing geopolitical tensions and economic sanctions. At a time when many countries are seeking to diversify their reserves and bypass the constraints imposed by the current monetary system, can this initiative truly shake the dollar's supremacy?