Elon Musk's SpaceX isn't the financial juggernaut that many were expecting, according to the IPO prospectus it filed yesterday. The big picture: It's expected to be the largest IPO ever, and could make Elon Musk the world's first trillionaire. But the prospectus shows just how much the IPO depends on expectations for future growth and investor servility to Musk — as opposed to the current underlying business. Those expectations will be severely tested if SpaceX really wants to be valued at $1.75 trillion — which would make it one of the world's 10 most valuable companies. By the numbers: SpaceX is wildly unprofitable, reporting a $4.9 billion net loss on $18.67 billion in consolidated revenue for 2025. For context, 200 companies in the S&P 500 had more revenue last year than did SpaceX. This includes Tesla, whose sales were five times higher.…