U.S. Treasury Secretary Timothy Geithner on Tuesday said the dollar would remain the world’s main reserve currency for a long time as the country takes the right measures to support the economy. “I think the dollar will remain the principal reserve currency for a long period of time,” Geithner said at a conference sponsored by the Securities Industry and Financial Markets Association in New York. However, he also said the dollar’s position is not a privilege and comes with responsibilities and obligations that the United States must uphold.