The British Pound Sterling is the oldest fiat currency in history, having been founded in 1694. Since then, it has depreciated like most fiat currencies, losing over 90% of its value so far. This is considered a highly successful currency that has existed for more than three centuries.The average life expectancy of a fiat currency is 27 years. This is an important feature that separates fiat from cryptocurrencies, as the situation is the exact opposite. For instance, BTC, the first major cryptocurrency to be created has lived for over 10 years now. This represents about 40% of the life expectancy of an average fiat.