PRESIDENT Vladimir Putin urged Russia's billionaires to put patriotism before profit, telling them to invest at home to shore up the economy in the face of Western sanctions. Addressing Russia's business elite in person for the first time since the day he sent his troops into Ukraine on Feb. 24 last year, Putin told them their role was not just to make money but to support society. "A responsible entrepreneur is a real citizen of Russia, of his country, a citizen who understands and acts in its interests," Putin said. "He does not hide assets offshore, but registers companies here,…