briefcase investor
n.— «As for the Chinese, she bitterly refers to them as “briefcase investors.” “They just fill their briefcases with our wealth and leave,” she said.» —“In Africa, China Is Both Benefactor and Competitor” by Lydia Polgreen, Howard W. French in Kabwe, Zambia New York Times Aug. 20, 2007. (source: Double-Tongued Dictionary)