the thing about money as a purely imaginary or fictional entity, or (to put it less pejoratively) the product of a convention: if people forget what it is or suddenly realize they don't have a grasp on the concept, it ceases to be anything at all. now that's a meltdown. it's a hopeful thing to say that race, for example, is  a social construction, because then it might dissolve like a mist at any moment. we're seeing money misting over right now. the end of race might be the end of certain kinds of suffering, though it is also a loss. the end of money is would entail massive suffering, though it might have excellent results as well, like an odd return to the real world.

really what replaced the gold standard is force: you are required to accept this stuff in payment of debts etc. but there are many factors in the value of money, which also functions as a fictive commodity and the value of which fluctuates by some funky analogue to the law of supply and demand. it could lose its value even without the complete disintegration of the force at the heart of its value.