SpaceX probably has a more or less guaranteed future as part of the military-industrial complex, and I think it's very likely that's Musk's actual vision - inroads into becoming the next Lockheed-Martin.

Remember that one of the very first Tesla investors, Mike Griffin, since way before a rocket engine had even fired, later became Trump's Undersecretary of R&D, and had previously been a high-ranking scientist of the Star Wars satellite missile defense program (and head of NASA).