The total amount of money in the world is an eye-popping, head-spinning $84 trillion. Of this, physical notes and coins are a modest $31 trillion. Money in the banks form a part of the rest but a large part consists of bitcoin and other cryptocurrencies.Bitcoin is a cryptocurrency that refuses to die though its death has been predicted over and over again. It is eighteen times more volatile than the US dollar, says an expert and yet this virtual money keeps going from strength to strength.