Economist Jim Rickards Bitcoin versus Gold Price Manipulation (businessinsider.com)

  "there’s pretty good evidence that there's a lot of
   fraud going on ... Are we supposed to believe that
   bitcoin is the only market in history that's not
   manipulated? That’s nonsense, of course it is"

This. A lot of smart tech people into bitcoin aren't vary savvy when it comes to how markets work and in particular how financial scams work.