Copper isn't really a precious metal, but maybe it's time investors started treating it like one. It shares a lot more in common with silver than you might think, and these similarities can tell investors a lot about potential opportunities for copper going forward. Like silver, it plays a critical role in technology and manufacturing and the global economy. It also notched record-high prices this year and world supplies are expected to tighten as demand for copper grows. "We could get to a point where copper is deemed 'precious' just from the standpoint of its importance to national security and the U.S. ... (full story)