Probably the BRICS currency.
As it will probably start to slowly replace the dollar as the World's Reserve Currency for large swaths of the global population.
I am not sure BRICS currency would take off. At best, BRICS can collaborate on academic and tech. And maybe some trade agreements. BRICS consists of three countries pursuing aggressive nationalist policies that can cause friction within the group. China-India border friction that erupted recently made India deliberately strip SCO of its usefulness. Russia is a unifying force for BRICS, because, Russia is otherwise isolated. Too much politics for a common currency. Remember, Brexit? Britain never accepted the Euro. India will weaken any grouping that strengthens China and weakens USA. India has its strategic reasons. Most smaller nations want to join BRICS. Russia and China are excited about it. But India and Brazil see no value in such an expansion.