Imagine that economy that we know it today is not needed anymore, personal profit stimuli is just a page of a history and social and political life is just different from it's today version.
How then needs of people are solved, and on what would you spend your time and energy in that case? Did you see the crypto there, and if yes in what role?)
P.S. I know the Ideas of Karl Marks about post-komunism and not a fan of it)
I do not think that what you are proposing can happen, the economy as we know can change somewhat especially if in the distant future cryptocurrencies are adopted or at least if gold is once again used as a currency, but capitalism is the only system that works, if people cannot benefit from their actions then people are not going to work hard and while production can be more or less replaced by machines creativity cannot be replaced right now so new inventions will stop appearing, this is why communist USSR was never an economic superpower.