Copper prices may jump 22 percent to $5 a pound within 24 months as supply dwindles amid rising demand, according to U.S. Global Investors Inc., which manages $3 billion in San Antonio. Other metals will also climb as the dollar weakens, U.S. Global said. Silver may gain as much as 30 percent in the next year and gold may rise another 10 percent after touching a record this week, said John Derrick, the firm’s director of research.