Me thinks Musk is stacking up companies the same way the stripper in "The big short" was stacking houses.
In both cases there is tons of leverage involved. The stripper levered up using home equity to buy new apartments, whereas Musk is using political climate.
The functional companies are relying on political climate as leverage.
Tesla= Political will to do something about climate change
SpaceX= Political will to do something in space for dick measuring contest purposes
The Boring Company= hype fueled scam
Neuralink = hype fueled scam