AI and blockchains are a fad, and nanotech is, at the moment, a marketing fad as stated. Although, the frustration with blockchain technology is more along the

AI and blockchains are a fad, and nanotech is, at the moment, a marketing fad as stated. Although, the frustration with blockchain technology is more along the lines of "this probably is wrong in principle" rather than "this is probably hundreds of years away" as in the case of AI and nanotech.