But for every optimist backing Musk’s bid to establish a human colony on Mars is an investor on Earth wondering if the plan will ever take off. Burry, in typical form, was open in asking that question.

In a Substack post, the analyst best known for predicting the housing crash before the 2008 financial crisis said he had reviewed a number of trading options for betting against Musk’s company.

“I am not involved with SpaceX now. Neither short nor, ahem, long,” Burry wrote Tuesday, per CNBC. Put options on the shorter end—expiring in June 2027 for example—cost roughly $13 with the stock trading at around $212, Burry reported. A put ending December 2026 was priced at around $6.75, he added.

Burry was “tempted by that one. But no thank you,” he wrote of the short option.

He isn’t sold on the eye-watering valuation of Musk’s latest venture, which he described as “fundamentally a small space company, a niche telecom, a bedeviled social media company, and a Coreweave-light.”