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Google is maybe the only other company with the capability to collect the data necessary to solve self-driving. But they don't own the car production, they need to partner, and hence are at the whims of traditional automakers' margins and product designs.

Tesla is collecting sensor data from their entire fleet, probably mapped to when the user needs to override autopilot. A really elegant source of training data when you think about it.

https://electrek.co/2017/06/14/tesla-autopilot-data-floodgat...

Overvalued stock happens all the time. Musk himself has repeatedly stated his belief that Tesla stock has been overvalued by the markets. Even with a bunch of fraud that is still different from Enron.

The stock price has no bearing on the financial viability of the company.