Money went virtual before it went to space
David Graeber’s Debt: The First 5,000 Years is useful here because it attacks a persistent myth: that barter came first, coins came next, and credit arrived later.
Graeber’s account emphasizes the much older role of credit systems, accounting units and recorded obligations. Money has often functioned first as a way to measure who owes what to whom, not as a physical object moving hand to hand.
Space will push finance in the same direction.
Sending gold to the Moon would be stupid.
Sending a reliable system for recording obligations would not.
The first off-world bank is therefore likely to be less physical than almost any bank in history.
It will be a trusted machine for maintaining claims across distance and time.