What do you mean by post-blockchain? I don't necessarily disagree; I mentioned in a previous post how I believe we'll come to distinguish coins with transactional value from ones with speculative. Bitcoin's a speculative asset that wants to be transactional. That was always the goal and insofar as it was the first successful cryptocurrency it'll remain our flagship, at least until the flippening, but eventually it will be viewed as a novelty like Dogecoin.