This can be achieved, but it will create alot of political issues with the US. I strongly believe they are moving to crypto to reduce fees, utilizing blockchain, specifically for direct trading between the two countries, I don't think the international trading pairs would be touched
"The virtual currency relies on the use of a distributed database between the central banks and the participating banks from both sides. It seeks to safeguard customer interests, set technology standards and assess cybersecurity risks. The project will also determine the impact of a central currency on monetary policies."
Ya all am saying is, if Ripple created similar solutions to xRapid (the only solution that utilizes XRP among Ripple solutions) using private currencies, like the one being created between UAE and Saudi arabia, it would scare away alot of investors.