By Luc Olinga Amazon’s founder and executive chairman is competing against with archrival Elon Musk for the conquest of space. Silence is golden, the saying goes. At least this once, Elon Musk seems to have understood this. Musk, who founded the rocket-technology company SpaceX, has not, yet, said a word about the setback taken by his biggest rival, Jeff Bezos. The world’s richest man (fortune estimated at $265 billion as of Sept. 12 by the Bloomberg Billionaires Index) and the world’s second-richest man ($160 billion) are competing to conquer space. Indeed, SpaceX faces Bezos’s Blue Origin. C…