Theranos was private, and its valuation went to 0. Tesla is public, and it lives as a meme stock. As long as enough fools believe Tesla will have self-driving taxis within Musk's latest timeline, the price can stay up, and nobody will sue. Instead, the investors voted to give him money that they had no obligation to give him.
This is a good take - 'As long as enough fools believe Tesla will have self-driving taxis within Musk's latest timeline, the price can stay up, and nobody will sue'.
What I'm describing is what happens after the pool of fools is exhausted.