I think is more plausible a cyberpunk scenario with as harari said dataism and transhumanism(with all its fuck up nightmares) , and eventually neuromancer style wintermute... again the power of unintended consequences normally shapes our fates, inmutability is a problem and a solution, its weird we think is less evil to allow free spech than censorship, maybe cuz censorship cripples change, but wait , most people hate change , but they they need it , inmutability also becomes a problem in the event of perverse actors and bugs. We are in the advent of distributed computing, is gonna be messy , but is gonna be long before the excel spreadsheets on steroids become self aware , although , the recent events , like amazon echo laughing and recording and sending shit by itself, or tesla and uber automated cars crashes, makes us weary , but truly the most disturbing is not the blockchain , but the data fb has on all of us and how is used to steer us. Again, i guess we have to imagine a future where we make it, cyberpunk or whatever. Interesting idea.