President Trump's signature is set to be added to all new U.S. paper currency, a first for a sitting president, as Americans use physical cash less than ever. The move is part of a broader effort to reshape how Americans think about money, with a recent approval of a 24-karat gold commemorative coin featuring Trump's image. The first $100 bills with the president's signature are expected to be printed in June, followed by subsequent bills in subsequent months. However, it could take weeks for the new bills to circulate through banks, despite the decreasing use of physical cash.