Come on, guys. One thing is speculating in Tesla's revenues regarding potential sales of a mass-market vehicle 10 years out. This is fully warranted, and skeptics are wrong to dismiss such calculations. Thinking big and far ahead is an area where traditional investment sense ("value investing") has failed time and time again, providing excellent investment opportunities in, for instance, Amazon, Netflix, Apple, Google and Tesla. But doing anything more than idle thought experiments regarding how Tesla
might participate in the construction of an engineering concept which is almost science fiction, is at best a waste of time. If there was a practical way to conduct such a bet, I would be willing to bet at that the Hyperloop will never be built ("never" meaning "at least not in 20 years", which is often a sort of horizon in science).
I do agree, DaveT, that the Hyperloop is a great example of the kind of big engineering ideas that Musk has the balls to seriously consider, and also that this is something which should be reassuring if you are an investor. It isn't unique among engineers to think big and out-of-the-box like this. Even personally, I've done some calculations and thought about the future of aviation regarding energy-efficient and feasible personal air transport. Where Musk
does differ significantly from any other engineer I know of today, is that he seriously considers and has in fact been able to be involved and execute in some such ideas on a very grand scale. Particularly SpaceX, but also Tesla, were in the camp of "
it can't be done" only a few years ago. In my lifetime, this is unprecedented. But hopefully this will inspire the current generation of scientists, investors and engineers to dare spending energy on big projects. Hardware is getting easier, and I think we are going to see more of this in the future. Meanwhile, I'd say don't beat a winning horse