You need miners consuming 3-4x the energy for the same heating capacity as a heatpump.
And then ask yourself if the Bitcoin earnings are worth the higher cost of needing more miners for the same performance, and energy
Discussion
That was going to be my next question. As a mining n00b I haven’t done the calcs to see at what point does it become entirely worth it. Or, is much of the hardware for solo mining sort of the “pick and axe” of the gold rush. It’s just entirely by chance you might get small return in a pool or whole block if lotto mining, but most end up with nada.
the latter