I get the history as to why we got to our current economic situations, but no one is arguing for a system that casts off current economic issues that are pushing humanity towards destruction. I’m not saying this can happen over night or even within our current life time, but it’s obvious that capitalism and even socialism has reached the end of their usefulness.
If trade occurs, then by definition they have currency; there are no barter economies.
You are confidently incorrect on this. Currency == money. Money is, for we hoi polloi, a barely consentual conversion and exchange system for our labor, hypothetically allowing us to convert our labor into readily fungible exchange units. Money, at the Capital Class level, is debt, and therefore control, i.e. power. Money is just how they keep score.
There are plenty of barter and Communist (“from those of ability to those of need”) economies, just on scales that fly below the radar of most economists. Your sweeping assertion leads me to believe that you may simply be ignorant of those non-monetary exchanges. Would you be willing to add more context to your assertion?