Excerpt from Asher Intrater:
The Greek economic crisis could cause a chain effect on the entire European banking system. The current Greek default is 1.6 billion Euros. By comparison, the US overall debt is 18 trillion (!) dollars. Over the last 3 weeks, Chinese stocks have lost more than one third of their value, despite government efforts to halt this unprecedented slide. Eventually, all of these economic problems could push for a unified world credit system.