Which is fair, considering that Musk poured all his fortune into SpaceX and Tesla to keep them afloat (dividing all his money between the two companies). The Boring Company uses technology from all the companies Musk runs, and those companies stand to profit greatly from The Boring Company. Estimates have been given that The Boring Company will be worth far more than Tesla and SpaceX in the near future.
Wow...hadn't heard that. It's really amazing how he can enter a rather mature market and develop innovations. I was reading the history of his first three TBMs on Wiki. The first was a stock purchased unit; the second was a modified commercial machine; the third is almost all-new from the ground up by his engineering and development team.