his is the largest dollar bill, issued for only a few weeks from the end of 1934. It was used for transactions between banks and subsidiaries of the Federal Reserve and has never been circulation for the general public. There are also counterfeit bills of one million dollars. But, although they have never been adopted as an official monetary unit, today they are of great value: they are in fact membership cards of a very closed billionaire club and collectors exchange them for hundreds of thousands of (real) dollars. In Zimbabwe, a country hit by hyperinflation, it is possible to buy tickets of one million dollars (the official currency of Zimbabwe from 1980 to 2009) for a few hundred euros.