The fact that the ESF has not yet attempted to destroy bitcoin means one of two [three] things: 1) either bitcoin is a govt sanctioned scam, or 2) they just haven't gotten around to destroying it yet:
;or
3) Nobody will accept a naked short bitcoin, as it not only is a naked short, but it is no easier to obtain, hold, and secure than a real Bitcoin. Paper gold, OTOH, is much easier to obtain, hold, and secure than real gold - which is why (some foolish) people accept it.