You need an exchange to do some core things that people want to use cryptocurrencies for. It may not be a crypto-as-a-theoretically/ideologically-pure-construc

You need an exchange to do some core things that people want to use cryptocurrencies for. It may not be a crypto-as-a-theoretically/ideologically-pure-construct problem, but it absolutely is a crypto-as-a-real-world-asset problem.