KroniK

So I had a thought, and Didnt see it anywhere on the first two pages of threads... Allomancy is based on a physical material which is a scarse resource. I know that only a fraction of the population has Allomancy, but eventually... the metals will all have been burned. I wonder if this is part of the push for space exploration in the last series? Anyway, I figured it was interesting enough to start discussion.