As a brothel in deep space.
No, well maybe, but on a more serious note, I’ll use to Carry ships to places.
It’s going to largely depend on two factors we still don’t know the answers to:
1. Fuel
We know it’s “Unique”, meaning it’s something not in the game yet. But how (in)convenient will it be to acquire? Is it going to take days of flying, searching, scanning, collecting and hauling to refuel a Carrier? Hours? Minutes? Will it be sold for Arx? If it’s painful to move a Carrier, I’ll likely park it somewhere interesting to me and use it as a forward operations center/semi-mobile base.
2. When will it move?
If, when I schedule a Carrier jump, it doesn’t move until Thursday at the update tick, or even if it doesn’t move until the following morning, and it does not require Herculean efforts to refuel, then I’ll be using mine as a “stopping off point” for deep space operations. Otherwise, it will end up parked somewhere that holds my interests until I decide to move it again.
As it stands right now I’m about 66 Carrier jumps from the bubble, That could translate to days, weeks, months or more than a year to get a Carrier to where I am, depending on #1 and #2.
Not exactly convenient, though the basic services available would be a blessing this far out.