U.S. casino magnate Steve Wynn plans to spend $4 billion building his long-awaited second Macau resort, shrugging off concerns Tuesday that the global economic malaise and China's slowdown will dent profits in the world's most lucrative gambling market. The project, which got government approval in early May, will house 2,000 hotel rooms, 500 gaming tables, 10 restaurants, shops, spa, meeting rooms and a nightclub.