William Buckler (2006)

In morality and politics, legitimacy consists of preserving, protecting and defending the ‘life, liberty and estate’ of the individual citizen. In economics and finance, it consists of preserving, protecting and defending the ability of the individual citizen to produce and trade the fruits of his or her labour. The foundation of this ability is the legitimacy of the medium of exchange (or money) used to facilitate this process. Destroy legitimate money, and you destroy free exchange between individuals.