Elon Musk isn’t afraid to buck conventional wisdom about sticking to your core business - Tesla builds its own batteries and even seats,  and it has branched out into stationary storage, solar panels, and  flame throwers. During Tesla’s most recent shareholder meeting, Elon  said the company might get into another line of business - mining. He  implied that taking control of the supply chain for the raw minerals  used in its batteries might be a necessity as Tesla scales up production  and adds more vehicles to its lineup.
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