I think the question about whether people will purchase electric cars and whether the TESLA is a good or bad car is decoupled from the side show of the Tesla price. I think the question is whether Tesla could ever achieve profits that would warrant the stock price on a sustained basis. Yes, Tesla is selling cars and based upon there last complete financial statement they had a revenue of $24.5 B which translated to revenue per share of $138. However, that is revenue not earnings. The earnings per share is -$5.
I am kind of old school in my thinking. Given the current interest rate climate, for a mature company I would probably like to see a price / earnings ratio of around 20:1. When Tesla hit $917 that would require an earnings per share of $45. Tesla has been kicking around for several years now so they are really out of that incubator phase and their technology would probably qualify as moderately mature. They should be transitioning into that regular cycle of new model development and investment that all other mature car companies deal with. Increasing annual sales would hopefully shift their fixed / variable costs per unit to the point that they actually show positive earnings per share. However, given their current maturity of development I am struggling with how they could ever increase their volumes and shift their margins sufficiently to move their P/E from -$5 to $45 per share.
I don't know anything about Tesla's production margins and how their costs would change with increasing production, so even if I had a view as to their future market sales I am not going to forecast what I think a future stable share price should be. However, I would be prepared to bet one whole beer that it will be less than $917. I will also bet one further beer that it will be significantly less that $917.