Tesla has solved the problem of unit profitably manufacturing EVs. Outside America and other petrostates, these are broadly accepted to be the future of transportation. (It’s getting its ass kicked by BYD, which didn’t distract itself with a Cybertruck or what increasingly looks like an Optimus follow-on. But being the only American challenger in a new economy is not worthless.)
Tesla’s also lead by a man who has consistently made money for his investors. Even when bets are bad, e.g. Twitter, he’s financially engineered an outcome that ensured, at the very least, nobody who backed him lost money.
Tesla being public, he can’t provide that sort of assurance to everyone who buys at any price. But he can at least credibly pretend to do that for anyone who buys in or near a primary.