Earlier quoted context omitted.
Why does the method of mining mean that a currency should not be accepted? Gold serves as a currency yet the methods of mining have changed drastically in the last 1,000 years.
Gold fell out of widespread use as a currency after the mining became industrialized. Nobody wants to play in a rigged game.
http://en.wikipedia.org/wiki/Bretton_Woods_system http://en.wikipedia.org/wiki/Executive_Order_6102
I'm not a gold bug and I see many problems with using gold as a currency, namely that the amount of currency in circulation should depend on how much stuff we can dig out of the ground. (In the case of BTC something about how many times a SHA-256 hash can be calculated.)
The idea that gold fell out of use as currency because of industrialization is either a completely new discovery in economics, or completely wrong. I'm pretty sure it's the latter.