Sure, but using aluminum as an example, if we take the modern production of aluminum (as a proxy for underlying demand) and multiply by the price of aluminum in the 1800s (when it was so incredibly precious that it was chosen to cap the Washington Monument), we would expect the modern aluminum industry to have revenues of around $100 trillion, or about 1000x what it actually has. The point is just that one cannot assume a resource extraction industry's future profitability without taking into consideration how increased supply will also lower the price of the product.