最新报道:Bitcoin mining sees a resurgence as older mining rigs re-enter the network, driven by rising BTC prices and improved profitability. However, analysts caution that this trend may not indicate sustainable growth, as many reactivated machines are outdated models like the Antminer S9, which face diminishing efficiency and higher operational costs. While hash rate has climbed to 500 EH/s, the influx of older hardware could lead to increased energy consumption without proportional gains. Experts suggest miners are capitalizing on short-term price rallies but warn that long-term viability depends on upgrading to more efficient equipment amid fluctuating market conditions.