In today's NYTimes, Krugman describes human rights and environmental reasons (uniting economists and sociologists!), other than the ridiculousness, for being against the gold standard:
The first money pit is an actual pit — the Porgera open-pit gold mine in Papua New Guinea, one of the world’s top producers. The mine has a terrible reputation for both human rights abuses (rapes, beatings and killings by security personnel) and environmental damage (vast quantities of potentially toxic tailings dumped into a nearby river). But gold prices, while down from their recent peak, are still three times what they were a decade ago, so dig they must. ...
Keynes would, I think, have been sardonically amused to learn how little has changed in the past three generations. Public spending to fight unemployment is still anathema; miners are still spoiling the landscape to add to idle hoards of gold. (Keynes dubbed the gold standard a “barbarous relic.”) Bitcoin just adds to the joke. Gold, after all, has at least some real uses, e.g., to fill cavities; but now we’re burning up resources to create “virtual gold” that consists of nothing but strings of digits.
Fill cavities? While this is certainly true, wouldn't a better example be jewelry? Hence, I'm smarter than Krugman. Q.E.D.