Martketwatch -- (and now, for a contrarian column) -- More and more investors believe there is a free lunch. That is, you get something for nothing. In investing, people have been getting a free lunch: Stocks (and bonds) have been rising for years without a bad turnout. Will there ever be consequences of massive money printing by central banks, $20 trillion in national debt, a high trade deficit, underfunded social-program liabilities and higher deficits resulting from tax reform? One would think so. In theory, gold is supposed to be a hedge against the supposed free lunch investors are enjoying. In...