Well as much as I like Star Trek and that society did come to mind, I guess we have to pretend machines did most of the work, while daily chores , washing dishes, mopping floors, cleaning a toilet, someone has to put the soap in the machine so it can clean. there has to be people to make the machines to do the work that people do not want to do, less you want to talk about advanced self replicating machines that have the A.I, to create new machines to advance society.
People in Star Trek were still building things like the ships,,, phaser weapons, weapons in general, and the advancements were only with in The Federation outside the federation were still advance societies but cut throat ones, ones that still had poverty and etc.
I am a fan of capitalism, but not crony capitalism and there is a difference. I for every semi quasi socalist, marxist, whatever society that sort of works or works to a degree, there is still a lot more negatives than positives, where as with capitalism, there is at least the chance to always do better and do so freely.
The thing with doing away currency is it is rather a misnomer, Currency is what ever you want it to be.
In prison, commodities like junk food, smokes, drugs, booze, all become currency. Same concept in an apocalypse situation or natural disaster, food , water, and supplies become currency.
Bit coin, is an imaginary currency that society has given legitamacy to. It can disapear just as fast as it was created. An when one currency system fails, another will be created.