thats the point of increasing bilateral trade within brics instead of denominating debts in "hard currency" areas like the dollar, they are gaining more independence by regaining their sovereignty, & while technically "fiat" it is more emancipatory than staying in "hard currency" areas. its also the same reason why free trade with the US in the UK caused the sterling area to collapse during the negotiations of the inter-ally debts & why the EU is becoming a debt hole for the troika & franco-german debts.