I am also not sure if it is a healthy move as there would inevitably be a dump afterwards.
since bitcoin is not some pump and dump shitcoin, its price will never "pump" and people like Mc Afee are only a tiny part of the ecosystem and their effects are only focused on the shitcoins, mostly the ICOs which he was advertising and getting paid for them and the altcoins that he obviously pumped.
other than that bitcoin is on its own trajectory and whales may manipulate it in short term but the long term direction and the final mass adoption result can not be change.