Many emerging market currencies are collapsing. John Rubino says these crises have the potential to spread across the globe, and could lead to the ultimate demise of the U.S. Dollar. Venezuela, Argentina, Turkey, and Pakistan all have currencies that are in crisis. These currency crises could be the catalyst for the crash of the U.S. Dollar. How can people protect themselves? John Rubino says safety is found in physical precious metals. He explains why gold and silver may be set up for a spike in the next six months.