Investor excitement around the SpaceX IPO is colliding with peak Elon Musk futurism after a new social media post featuring his musings about light-speed travel and exploring alien worlds.TSLA stock is moving. See the chart and price action here. Musk's Latest Space TeaseIn a social media post Monday afternoon, Musk leans into his long-running theme that humanity must become a multi‑planet species, riffing on concepts like near light-speed travel and distant planets. "It would be amazing if AI could figure ...