When a company with a wildly successful brand name and positive public image is burning through over a billion dollars per year more than they bring in, it is perfectly reasonable to question the feasibility of their business model. When their top selling product is still 18+ months away, all deposits are 100% refundable, and there are competitors planning to enter the market, it is only reasonable to question if the market interest will turn into actual sales or not. The fact is, Tesla does not have the money to last the next 18 months and deliver the model 3 and supercharger stations they have promised. They need to get investors to bet on their future success or they won't even have a chance to try. Their tech is nothing special, and the more established and experienced auto makers are poised to pounce when market acceptance and profitable price points coincide.