Bitcoin is proving a big disappointment. . . . There’s almost certainly more bad news to come. The electronic token has lots of enduring problems. As a store of value that is not subject to government intervention, it lacks the support of authorities and is always in danger of being banned. . . . Defenders of Bitcoin have not given up hope. Their emphasis has shifted though, from the currency to the underlying blockchain processing software. . . . But it will not bring up the price of Bitcoin.