Elon Musk likes to do everything on a grand scale. When he takes SpaceX public in the coming months, it will likely be the biggest initial public offering in history. Although SpaceX’s recent Securities and Exchange Commission filing for the IPO was confidential, indications are that the conglomerate is looking for a valuation of $2 trillion. That would instantly make it the sixth-most-valuable U.S. company. By conventional standards, SpaceX isn’t worth anything close to $2 trillion. The