I think people should start paying more attention to wording. It seems "cryptocurrency" or "blockchain" is being conflated with "bitcoin", but they are not the same. That Twitter quote said he was hosting a blockchain event, and if you make the careful distinction, that gives his 'Bitcoin' comments a very different meaning. Ripple is also blockchain.
I just read a post on Bitcoin.com talking about Goldman Sachs planning to get into Bitcoin in Q3, 2018, but the actual quote said "Crypto currency". Very different meanings.