The “Zettahash Era” has paused. For the first time since September 2025, Bitcoin’s network security budget has contracted below the psychological 1 zettahash per second (ZH/s) threshold, clocking in at 988 EH/s Saturday morning. The reversal signals severe profit compression for industrial miners as Bitcoin struggles to hold the $95,000 range.
Capitulation by the Numbers
Data from Bitcoin.com confirms the network shed approximately 174 EH/s from its October 2025 peak of 1.162 ZH/s. This 15% drawdown is not technical noise; it is an economic purge. The catalyst is the hashprice, the revenue miners earn per unit of computing power, which recently bottomed at $34.55 per petahash/second (PH/s).
While the metric has rebounded slightly to $41.22/PH/s, it remains below the breakeven threshold for older fleets (specifically S19 XP series), forcing operators to unplug hardware to preserve cash flow.
The drop in hashrate reflects a combination of factors, including reduced profitability for miners and a recent pullback in network difficulty.
The Difficulty Lag
The network’s self-correcting mechanism is lagging behind the price drop. While difficulty adjusted down by 1.2% on January 8, it was insufficient to stem the bleeding. CryptoSlate notes that a more aggressive -5.45% adjustment is projected for January 22. Until then, miners are effectively paying a premium to secure the chain, a discrepancy likely to accelerate consolidation among mid-cap public miners.
