Did you know we mined about 80% of all the gold in the world? In 2020 the total gold to be mined was about 240k metric tones (which is quite an impressive number) and we mined by now more than 190k metric tones. The rest of the 50000 metric tones will become harder and harder to mine until the last pieces of it will not be worth the effort anymore.
And this is happening to most of the resources that we can access