Tesla Inc. (TSLA) CEO Elon Musk just casually threw out the idea that SpaceX could one day be worth $100 trillion. Yes, you read that right—not billion, trillion.

Moon Factories and Magnetic Launchers

Musk made the eye-popping comment on X over the weekend, responding to a post about his plans to build a base on the moon. This follows President Donald Trump's executive order pushing for humanity's return to the lunar surface during his administration.

"Insane amount of work between here and there, but it is possible," Musk wrote. He's been floating the idea of constructing factories on the moon to support deep-space launches of solar-powered AI satellites. The kicker? These would use mass drivers—a theoretical propulsion method that accelerates payloads through magnetic levitation via electromagnets. Think railgun, but for spacecraft.

The IPO Conversation

Meanwhile, investor Bill Ackman of Pershing Square Capital Management suggested SpaceX could go public next year through his special purpose acquisition vehicle, Pershing Square SPARC Holdings. Ackman positioned this as a way to "reward loyal Tesla shareholders with the opportunity to invest in SpaceX."

Musk himself teased this possibility at Tesla's annual shareholder meeting back in November, saying he wanted Tesla owners to have access to SpaceX stock. Ahead of a potential 2026 IPO, the commercial space company could be eyeing a $1.5 trillion valuation—which would make that $100 trillion target look like quite the journey ahead.