The only thing keeping the dollar alive, and the euro, is faith. When that fails, everything falls apart. The liberals, elitists, one-worlders, and the room temperature IQ mouth breathing leech voters have ruined an entire nation........................
Ignoring the Euro, that's an oversimplification. It's "faith and credit." And there is a statutory link between the credit of the US -- the value of US debt -- and the earning power of US citizens -- that's a bit more than faith.
Estimations of the strength that earning power, the ultimate value of the dollar, the likelihood of the US Gov't to truly default, etc do enter the realm of speculation, which is lumped together with "faith," but only carelessly.