I believe that in one hundred years, blockchains will be as common and necessary as electricity is today. They will be fundamental pieces of the economy which nearly everyone will interact with on a daily basis. They will be so normal that we will forget they exist.
This is reflected in Coase’s Theory of the Firm. You can do marginal improvements, like applying decision support systems within in an organisation, but every once in a while, a large systemic change occurs that at first looks like a marginal benefit, but in essence enables wholly new type of organisations to exist.