If you really believe that US currency is fake, you shouldn't mind sending me all of yours. But, of course, you're not about to do that, are you? Neither would Ron Paul.
In a sense, money itself (whether backed by gold or not) is a game that requires all of the players to agree that it has value. As long as central banks act responsibly, there's little reason to fear fiat currencies and market driven exchange rates. Manipulation of the money supply is one of the two mechanisms governments have to moderate the cyclical swings of capitalist economies (deficit spending is the other). Countries (including the US) that were on the gold standard took longer to recover from the Great Depression than countries that were not in part because the latter had a better toolset to address the problem.
It's true that the gold standard effectively prevents hyperinflation from occurring, but sound monetary policy does so as well. Germany doesn't need to be on the gold standard to avoid a repeat of the Weimar disaster; a solid knowledge of economic history is sufficient. In the meantime, there is a broad consensus among economists that a return to the gold standard would not favor the average citizen.