4T? What 4T?

[Kinser79]

Probably not entirely. A drastic drop in the price of gold or silver would flush the other out of circulation relatively quickly. That said the fixed system was somewhat unwieldy and did not respond quickly to market forces or such things as finds of mineral deposits.

While I think we will be faced with mineral scarcity on earth there is nothing preventing the development of mining operations on other celestial bodies other then perhaps the absence of a lunar base.