I don't get it. Why would anybody in their right mind want to heat a building using the waste heat from electrical devices when it's far more energy efficient to just use a heat pump?

Well the heat is going to be generated from high capacity computer processing so might as well capture it and use it because you can't mine cryptos with a heat pump

Would it be profitable for people to invest in a mining op if I started one because my electricity bill is the same every month no matter how much electricity I use.