How low can Bitcoin go? Well, when it was 2500 USD, it was still very profitable to mine with electricity costing 0.12 USD. There are plenty of hashing power who operate using electricity at 0.06USD. Include those who dont pay taxes and can afford electricity at 40% higher cost and there you have it - Bitcoin can go down until it is still profitable to mine with 0.084 USD (that is lower than 2500 USD).