Who said there won't be paper money?  The Silver Certificate backed by gold and fully exchangeable into gold comes to mind. And bitcoin is a neutral currency. It is uncontrollable by a centralized power.  That's why it's hated.  You can fashion a scenario where we're all controlled by a Marxist one world government power, or you can fashion one of unbridled, heading toward anarchy free market Capitalism.  Bottom line, a model where the individual citizen carries the power of the economy means the collectivist will not have the ability to fashion that one world gov't you see coming.