For 30 years, the world has been living on cheap credit, cheap food and cheap energy. That may be set to change, argues Patrick J. Byrne.Billionaire financial market speculator, George Soros, has warned that the credit crunch, started by the US sub-prime mortgage market collapse, could mean that the “financial bubble” of the last 25 years could be drawing to an end and the post World War II “super-boom” era could also be over. (BBC News, May 19, 2008).This period has been characterised by cheap …