Alex Tapscott is chief executive of NextBlock Global. Bitcoin is the mother of all cryptocurrencies, and the most famous of them. Created by a person or people using the pseudonym Satoshi Nakamoto, it defined the algorithms that enable the transfer of assets from one party to another without an intermediary, such as a bank. This helped to kickstart what we call the blockchain revolution. Yet despite its staggering growth – up 500 per cent in