What is really holding back electric car adoption is the lack of models and the high price.
Currently if you want/need a pickup truck you can't buy one, no matter how much money you have.
Teslas next step is the Model 3 sedan and shortly thereafter they will follow up with a Model Y crossover. At that point the whole thing will explode. Also remember that Tesla currently is one of the auto-manufacturers with access to their own battery-factory.
GM, Ford and almost all the other big ones are limited by the fact that the current worldwide capacity for Li-ion battery production will not cover their needs. Also they would be dependent on LG Chem, Sony, BYD and Samsung for their batteries and it would basically reduce them to makers of wheel-shells. So it's no wonder that they don't want to go down that path.
The german auto industry has been caught completely flat-footed and has no battery manufacturing capacity to speak of, this potentially could be the end of them.
So Tesla is well placed in the market that will arrive in the next 4-5 years. This is why investors are flocking to their stock. The big automakers missed the change, missed the target and are too slow to turn.
BYD, Tesla and a few others will eventually have them for lunch.