Miners are computing hashes for a very specific chunk of data. And it's also double SHA256 which is not used in any standard key-derivation function. Specialize

Miners are computing hashes for a very specific chunk of data. And it's also double SHA256 which is not used in any standard key-derivation function. Specialized mining machines implement a lot of shortcuts to optimise for that exact hashing (in silicon!) and are useless for anything except Bitcoin mining.