There are some good points there. I would like to add some more.

A) The govern-cements, already with their war on terror, will start using it more heavy handed. The U.S. will not outlaw gold like they did last time, they will just see it as a sign that you are a bad guy (along with having 7 days of stored food) and use said findings to confiscate all your possessions.

B) Govern-cements will lose control of the money supply. The more you tighten your grip, the more sand slips through your fingers.
I do not know how this is going to play out. My feeling is that the big banks will start to roll out "block-chain" (but not distributed) based currencies, just at a time when someone comes up with an idea that might be called super-block-chain technology. And with the flow of people already transferring to the block-chain, they just keep going and the govern-cement loses all control.

C) I believe Bix Weir is only partially correct on how much gold their really is. I would not be surprised if Rothsmallperson and the Vatti-cant have more gold each, than what is currently thought to be "the entire worlds holding". And, I believe there is at least three other groups with a similar gold horde. Any one of these groups could crush the gold price for a decade with oversupply.