There is so much coal. There is at least 130 years worth at current consumption levels. And despite what everyone says about renewables and green energy and etc, world use still hit a high in 2024. We aren't going to run out of (coal at least) for a long time--and usage is still going up!
Also, China and India are both doubling down on coal after the Iran Crisis as their Coal Gasification [0] strategies [1] were made for this kind of supply chain risk in mind.