Now, Deutsche Bank's chief economist, David Folkerts-Landau, is calling for a 150 billion euro bank bailout, noting that Europe's banks are 'extremely sick and must start dealing with its problems extremely quickly.' In fact, the International Monetary Fund has gone so far as to label the bank as the greatest threat to the global financial system. stock markets near all-time highs, the potential collapse of Deutsche Bank (NYSE: NYSE: DB) could cause turbulence centered in Europe but with the potential to spread globally.