Imagine hauling in enough platinum, gold, and rare earth metals to bankroll every American's wildest dreams–or potentially tank the global economy overnight. That's the high-stakes gamble NASA and a cadre of innovative U.S. startups are wagering on the untapped riches of asteroids. As NASA's Psyche spacecraft hurtles toward its 2029 mission toward the metal-rich asteroid that shares the same name as the mission, a cadre of U.S. startups is accelerating efforts to turn celestial rocks into a viable business, potentially reshaping global supply…