Some of these theories include a collapse of the Euro Zone and a possible break-up scenario and another Greek default.

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They dabble in conspiracy theories and talk of the collapse of civilisation and the need for investors to sell all paper assets, buy gold and retreat to Idaho.

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Crazy as such talk may sound to euro-zone governments that believe they have strained every muscle to save Greece from collapse, it will convince some people in a country where conspiracy theories (and, indeed, conspiracies) have a long history.

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"The great thing about conspiracy theories is you just let them go on and on, until they collapse under their own weight, " he said.

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