Space is the next great frontier and right now every single other company, and even country, remain orders of magnitude behind SpaceX. This could change in the future and viable competitors could emerge, public ownership could ruin SpaceX, or humanity's further entry into the cosmos could be delayed (Americans circa 1969 certainly probably also felt they were on the cusp of something great). But at current trajectories you're looking at something akin to there being one company that made ships better way better than everybody else, right before the Age of Sail kicked off.

"Worth" here means market cap. Which is almost completely divorced from its potential earnings.

A similar path to Microsoft. Being the primary gate holder to a developing market segment aka space. In our modern overvalued stock indexes they are worth 750 billion before considering future growth.

UFO soft-disclosure is already underway (the Pentagon releases more and more evidence). The USA will go full disclosure before the end of Trump's second term. SpaceX will be granted monopoly on the reverse-engineered alien spacetime propulsion tech, becoming the most valuable company ever. The SpaceX IPO is the final act of the plan that was set in motion when president Eisenhower signed the pact with the Zeta Reticulans (aka "the greys") at Holloman Air Force Base in 1954.

Simple as.