I was just thinking about this yesterday. As long as there is scarcity there would be money. I think they would have less scarcity but still a few things will always remain scarce.
Discussion
Right, even if I could conjure up entire spaceships at the push of a button, and rare artifacts can be reconstructed atom-for-atom Ship of Theseus-style, and an exacting AI simulacrum can be created of just about anyone, there still will need to be a way to convince others to do something they ordinarily wouldn't do, if only so that those people can have a means to convince others they might one day want a favor from. Further, energy-money could be a very interesting use-case, and with sufficiently high amounts of proof of work, the less there is a difference between energy and money.