Bitcoin mining profits have plummeted to their lowest level in 14 months, according to CryptoQuant data. The miner profitability sustainability index has dropped to 21, the lowest since November 2024, as Bitcoin prices fell sharply this week. Despite a decline in the Bitcoin network's hashrate for five consecutive periods, reaching its lowest since September 2025, miners continue to face "extremely low" earnings. The situation is exacerbated by recent severe winter storms in the eastern United States, which have caused significant disruptions. These conditions have further impacted miners, already struggling with the current mining difficulty and reduced Bitcoin prices.