A 4090 can do tens of GH/s on SHA256D (BTC) for a substantial capital investment and 300W - other GPUs substantially less. A $10 ASIC can do >500 GH/s for 5W.

A 4090 can do tens of GH/s on SHA256D (BTC) for a substantial capital investment and 300W - other GPUs substantially less. A $10 ASIC can do >500 GH/s for 5W. If you possess these GPUs, at any energy price it becomes orders of magnitude more cost-effective to mine something else, rent for LLM uses, etc. and then just buy Bitcoin.