In 1929, years of wild debt-fuelled speculation over company stocks came to a halt with the worst economic disaster in history. In 2001, years of wild debt-fuelled speculation over technology companies that were apparently going to revolutionise the future came to a halt when most were shown to be worthless. And in 2008 years of debt-fuelled speculation from borrowers that just needed that 5th investment properties and the bankers that were more than willing to accommodate this to sell some more mortgage bonds, came to a grinding halt when people realised that everything propping up this speculation was based on absolute garbage.