The issue is that its not clear what other markets SpaceX can grow into. The rocket market is small. The government market for sats and the commercial market for sats is bigger but SpaceX already domiantes that.
Its not clear to me how much room there is for that kind of growth to continue.
They are the overwhelmingly dominate space company, but how much actual revenue growth can you get from that. Telecommunications is already the largest part of the sector, and SpaceX already the overwhelmingly dominate player.
At some point you need to break into something other then that to be able to continue to grow.
Or maybe my assumption about that is wrong, and combined with Starship launch will be so cheap that it can compete against some broadand on the ground. But that seems speculative.
> its not clear what other markets SpaceX can grow into. The rocket market is small
Ten years ago, smart people said the launch market couldn't possibly grow beyond $3 to 5bn.
There is a tonnne of induced demand when it comes to launch. In LEO alone we have telecommunications, sensing and defence applications, most of which don't do well when put on the same bird. Add to that potential power-transmission uses and a global race to the Moon and Mars and it seems even if Starship can be mass manufactured, production will be the limiter, not demand.
> combined with Starship launch will be so cheap that it can compete against some broadand on the ground. But that seems speculative
Doubtful for broadband. Probable for rural and maybe even suburban cellular.