No industry better epitomizes elite tech opinion as blockchain. Ignored for years in its infancy, the industry received intense interest from investors, engineers and the public five years ago, generating some of the most deeply devout evangelists that have emanated from startups since the advent of the World Wide Web and the dot-com boom. Then, it all burned down, but a few companies made it through the flames, among them Coinbase . Coinbase today is still valued at a 2018 price of $8 billion, and is expected to go public…