To short an asset, you borrow it and then sell it. I'm not getting the buy to short rationale. I think @jrcornel has a more plausible explanation. If a crypto becomes some sort of international reserve currency, then I could see central banks as owners. I'm not buying the technotronic enslavement conspiracy of the central banking cartel. The central banks of the world have not been able to agree on a lot in recent decades. Look at Basel banking regulations, post 2008 crisis monetary policy, etc.