Stockpiling critical minerals is a purchasing problem long before it is a mining problem
Governments have responded to China's export controls by promising to stockpile, to fund refining and to set price floors. Each is a different instrument with a different failure mode. A stockpile buys time, a price floor buys investment and a refinery buys capability, and the three are often confused in the same announcement. The binding constraint is not the ore in the ground but the separation plant that turns it into something a magnet factory can use.
