Asteroid mining is the obvious one. That said as part of looking into SpaceX's business I learned that currently the TAM for launching other people's stuff into

Asteroid mining is the obvious one. That said as part of looking into SpaceX's business I learned that currently the TAM for launching other people's stuff into space is under $10 billion. SpaceX already owns most of that market. Their own focus on data centers in space IMO speaks for itself.