Everyone should know Elon Musk, the world’s richest man.

When he asked all employees to build rockets to send people to other planets. His employees thought Musk was crazy. All his rich friends think he's crazy? He sold all his stock and asked all employees to sell their valuables. When the rocket built this time can successfully fly to the moon, they will be rich. The greatest investment in the world, no one dares to invest so much.