Citing ZeroHedge conspiracy theories as fact: hilarious. Maybe there is a grain of truth to that, but I think it's more likely that a) the Chinese government is very worried about capital flight and the difficulty in linking identities to cryptocurrency transactions and b) Jamie Dimon was just piling on the FUD given the existing market uncertainty around China.
He's been dropping FUD bombs on Bitcoin since what, 2012? Nothing new here, and I don't think it necessarily means he's accumulating. Just as likely that he wants to teach his Bitcoin-investing daughter a lesson.