Elon Musk, CEO and CTO of SpaceX, CEO and product architect of Tesla Motors, and chairman of SolarCity, attends the Allen & Company Sun Valley Conference on July 7, 2015 in Sun Valley, Idaho.

CREDIT: Scott Olson/Getty Images

SUN VALLEY, ID – JULY 07: Elon Musk, CEO and CTO of SpaceX, CEO and product architect of Tesla Motors, and chairman of SolarCity, attends the Allen & Company Sun Valley Conference on July 7, 2015 in Sun Valley, Idaho. Many of the worlds wealthiest and most powerful business people from media, finance, and technology attend the annual week-long conference which is in its 33nd year. (Photo by Scott Olson/Getty Images)