SpaceX “flippers” who sold shares immediately after the company’s massive IPO are kicking themselves after the stock’s meteoric 50% rise – though early options trading shows many are doubtful the frenzy can last. The stock had gained nearly 50% in its first three days of trading as of Tuesday’s close, making Elon Musk the world’s first trillionaire and briefly shooting SpaceX’s valuation past those of Amazon and Microsoft. “We all feel like idiots for not trying to buy it at $135,” Allen Tran,