I would be far more interested in how to build a successful business. Everyone asks Elon about his big ideas, but how do you turn those big ideas into reality, specifically? I have never seen anyone ask him those questions. I thoroughly enjoyed the interview with Jessica Livingston because that was the primary topic. A missed opportunity in my opinion. I hope the rest of the interviews are more about the nuts and bolts of how to build a successful business.
EDIT
Ask him about the early days at PayPal. What are the lessons he learned that he applied to Tesla and SpaceX? What worked for PayPal but not the other companies and why?
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