What is the opportunity cost for bitcoin mining using different techniques? (ie the next most valuable thing that can be done with the hardware). I would guess

What is the opportunity cost for bitcoin mining using different techniques? (ie the next most valuable thing that can be done with the hardware). I would guess it is a small fraction of the value of a bitcoin. I'm pretty sure it didn't cost bitcoin's market cap of ~1 billion in computing resources to mine all of bitcoins we have today. I wonder what it did cost?