[motohagiography]

The "spaceness," of the business needs definition. Maybe you build drones to defend asteroid mining claims and equipment, stealth communications for space prospecting, cryptographically sovereign networks for space supply chains, low gravity weapons and anti-piracy defences, solar sails, a navigation scheme and commercial beacon network, etc.

The nearest term use case for commercial space tech is going to be regulatory arbitrage, so if you can deliver content and secure a physical space jurisdiction for a legal system, it will be the new off shore.

[markovian]

In short, infrastructure. Where would you start?

[motohagiography]

Infrastructure doesn't cover it. Without a way to defend it, there will be no investment, so crypto and directed energy defences. Payments, identity, etc. Same as earth.

[TeMPOraL]

It's space. Kinetic weapons will be just enough; one needs to make the shooting mechanism reliable in space.