A new currency would be rather immersion-breaking. Yes we have multiple currencies today, but they can be exchanged. Currencies regulate the flow of goods and services.
I can just about accept Engineering, the Engineers are independently wealthy hobbyists who don't need cash. But I hope that suits and other basic items can be bought with credits (and be much cheaper than a stock Sidewinder).
There are a few things that might be more expensive than a ship. For instance, perhaps it's difficult and expensive to miniaturise a shield generator to fit on a suit, or the powerplant for it (which would probably have to be nuclear). And modern jetpacks are close to the limits of non-nuclear power supplies.
And then there's the concept of "restricted military tech". Perhaps you'd have to run military (or illegal) missions to earn "military credits" that can be used to buy restricted tech.
I can just about accept Engineering, the Engineers are independently wealthy hobbyists who don't need cash. But I hope that suits and other basic items can be bought with credits (and be much cheaper than a stock Sidewinder).
There are a few things that might be more expensive than a ship. For instance, perhaps it's difficult and expensive to miniaturise a shield generator to fit on a suit, or the powerplant for it (which would probably have to be nuclear). And modern jetpacks are close to the limits of non-nuclear power supplies.
And then there's the concept of "restricted military tech". Perhaps you'd have to run military (or illegal) missions to earn "military credits" that can be used to buy restricted tech.