He has built Tesla into the only agent of change in the auto industry since Henry Ford.
He will build it into a true global player and peer of the likes of Ford GM BMW VW etc. Elon will continue to thrive because he looks first to the safety and care of his customers, rather than corporate profits. Customers will appriciate the car, then the profits will come.
Will Tesla kill any of those giants? No. Although they may still kill themselves. Will any or all of them combined kill Tesla, not a chance. The market will support many players and thanks to the large auto makers refusal to innovate in the 80’s and 90’s Tesla is now a firmly entrenched member of that market.