Trump's problem is not the "BRICS currency", but China's payment system that bypasses SWIFT and challenges the supremacy of the dollar in global trade.
The real challenge to dollar dominance is not a new currency, but the payment infrastructure that China is building.
While the SWIFT system allows the U.S. to use the dollar as a geopolitical tool, the Chinese CIPS offers an alternative for global transactions.
With CIPS, countries like those in BRICS can do business outside of Western control, reducing dependence on the dollar and redefining the rules of global trade. The dispute for the financial future is not in the creation of a new currency, but in the adoption of a new system.