This is pedantic to the point of wilfully not wanting to understand that the coal industry is implied with that statement. But if we're going down the pedantic route:
> Going out of business is capitalism's way of saying your product is no longer required.
Demand and need are correlated, but not the same. Capitalism works with the former, and also has an entire industry devoted to creating demand when there is no need. I'm not saying capitalism is bad - it is an amoral system and a very effective tool for a lot of things. By itself self-regulates only to the vested interests of the people wielding the tools within the capitalist system, and this does not have to align with societal or planetary needs.