I feel like one day, central banks are going to be attacked by private banks and the means of attack will be cryptocurrency. The aim will be to get rid of central bank deposits and seize control of the payments system - once the central bank deposits are gone and we're cashless, this will become easy. They could even base it offshore to avoid consumer protections. If we're lucky when this happens, it will be a test of the remaining power of nation states. If we're unlucky, they'll roll over as the most basic means of exchange is privatized.