McAfee and his comments are just idiotic.   "Ancient technology," "worthless," "least used" just shows his own lack of technical understanding not to mention understanding of the genesis of bitcoin.  The rest of the crypto-sphere is extremely centralized, one person (or a very small group) can pretty much control most (perhaps even all) other cryptos.  Look at the ether split from a few years ago.

He just likes trolling people and getting press.