The chart appears for me.

After all I think the supply we can dig out will eventually start to dry out and we would need to rely on the harder to mine places.

The amount of minerals under our ocean floor is reported to be astronomical compared to what we found so far. For example, there is believed to be $500 trillion worth of gold under the ocean floors. The problem is getting it up, especially in a cost effective manner.

Underwater mining (vacuuming) is going to be huge as our unmanned under water drones get better. This is going to be the key to mineral extraction.

I really dont see asteroid mining impacting things on Earth. The cost to mine and bring back would be insane compared to price especially since huge finds would collapse the price. If we go down that road, I would venture to say they use it for other space related activities (like space manufacturing).

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