@lore Actually this rabbit hole goes much deeper than people think.
A cryptocurrency miner is almost exactly as efficient at heating a room as a space heater, except it pays you when it does. So if we replaced all space heaters with cryptominers then you would get payed to heat your home rather than paying to heat your home.
In fact there was a company that did exactly this, they sold space heaters that were cryptominers. I wish I could remember the name.