Yup! even though he is saying that he already dump all of his bitcoin I also think he is keeping a backup of it and wants other people to do the same thing to dump their bitcoin so he can proceed with his scheme I think he wants to control the movement of bitcoin by giving FUD on the past, well I don't really think that is his real intention by we can never know for sure, he can always have his bitcoin by buying it, mining, trading he can do it in secrecy and nobody can ever notice it because yup bitcoin is anonymous and decentralized.