Several interviewers have asked me about the ridiculous idea of the US government "paying" its debts with trillion-dollar platinum coins, but Liberty and FInance's Elijah Johnson put his finger on something important when he asked why it had to be platinum. It can't be gold, of course, as that would make gold legal tender again. But the need to use something real and objectively valuable is telling. We also covered that changing role of silver as an industrial as well as a monetary metal, and how resource speculators should navigate country risk around the world.