BRICS attendees were advised to bring dollars and euros to the summit.Contributor/Getty ImagesRussian President Vladimir Putin is hosting the BRICS summit in Kazan, Russia.Putin is touting trade in local currencies, a move away from the US dollar.Despite the de-dollarization push, summit organizers advised attendees to bring dollars and euros.Russian President Vladimir Putin is hosting a major summit with over 20 world leaders, whom he's trying to convince to ditch the dollar.De-dollarization is one of Putin's priorities because trading in local currencies means that a heavily sanctioned Russia would not be beholden to the Western US dollar-dominated global financial order.But it's not easy to move away from the greenback.