With telsa it was robotaxis, and when that failed to materialize, humanoid robots (fucking LOL).
SpaceX is an even more insane example. They are eyeing an IPO at a 1.5 trillion valuation. And yet the market for satellite launches is simply not that big. (What would you do with a satellite, if I gifted you one for free?). Estimates have SpaceX doing about $3B in annual earnings, which would give them a 500x earnings multiple at a 1.5T valuation (Apple: 35).
And so SpaceX/Elon had to invent the absolutely idiotic idea of "data centers in space" to sell some future vision of tens of thousands of launches per year.
He keeps upping the ante (and the ridiculousness of the vision), and so far investors keep funding it.
Me? I've realized that this madness is entirely "opt-in" and I choose to simply...not opt-in.