Gary Shilling, veteran economic forecaster and president of A. Gary Shilling & Co., explains to BNN Bloomberg why he believes commodities are in for a bear market. He says a drop in copper futures points to a coming global recession, even as inventories of the metal remain high due to shrinking demand. He also points to high inventory at retailers like Target as a sign of economic slowdown. On Bitcoin, Shilling says there’s no legitimate use for it, and he believes it could well be a Ponzi scheme.