Elon Musk raised eyebrows on the Tesla earnings call Wednesday night by claiming the electric car maker was on track to become one of the most valuable companies in the world. "A couple years ago when the stock was at $200 … you outlined a scenario where you could get to $700 billion in market cap. That's about where Apple was at the time. We're two years later, you're obviously close to the Model 3 launch, how are you looking at that?" Barclays analyst Brian Johnson asked on Tesla's first-quarter conference call Wednesday, according to a FactSet transcript.