You're not paying for speculative revenues. You're paying for known quantities of valuable material. It's also highly unlikely Apple will last 400 years, so no

You're not paying for speculative revenues. You're paying for known quantities of valuable material. It's also highly unlikely Apple will last 400 years, so no one would price them at this. As I said, this is an estimate. Coal covers a very large part of the US (38 states, totaling about 13% of all US land area), and we have about 25% of the entire world's coal reserves. Even if you bought rights to some existing mines, demand for energy would simply make people build new mines on neighboring land. So you're going to play a game of catchup trying to buy all the coal bearing land (or at least mineral rights). Consider simply the cost of buying 13% of land rights (or even enough to make a dent in the production) in the US. It's staggering.