One of the world's most famous fund managers says Wall Street is a 'super bubble' waiting to burst and a 'terrible lust' for profits will bring investors undone. Jeremy Grantham is the co-founder of GMO, which claims to have predicted the Japanese crash of 1989, the Dotcom bust of 2000 and the global financial crisis of 2008. He's now warning of another similar crash in asset prices, with speculative tech stocks first in the firing line