Bitcoin's post-retarget relief for miners was real, but narrow. At a BTC price of $84,751, the completed difficulty increase and latest gross hashprice reached approximately $40.31 per petahash per second per day—roughly 2.65% above the prior modeled baseline.
However, early indicators suggest limited durability. The next difficulty estimate is pointing 2.48% lower, based on slower-than-target block production in the current epoch. At 14.43% completion of the new epoch, blocks have averaged 625.3 seconds, or about 10 minutes and 25 seconds.
Price Clears the Hurdle, but Narrowly
A prior analysis calculated that Bitcoin would need to reach approximately $82,877 to neutralize the revenue-per-hash impact of the difficulty increase forecast for September 19. The realized adjustment was less severe than projected—difficulty rose 4.1634% to 132.757 trillion at block 967,680. Bitcoin's actual price of $84,751 was about 2.26% above the model threshold.
Relative to prior model inputs, BTC's price had risen about 7.07% while realized difficulty increased 4.16%, improving the price-to-difficulty ratio roughly 2.79%.
Fees Remain Minimal Support
Transaction fees offered little additional protection for miners in the measured window. In a 144-block sample, fees averaged 0.01422626 BTC per block, representing about 0.45% of total rewards. Miner revenue remained overwhelmingly dependent on the block subsidy and BTC price.
Network hashprice cannot determine which individual operators remained profitable, as fleet efficiency, power contracts, and other costs differ significantly across mining businesses.
Early Retarget Signal Remains Uncertain
The projected difficulty decline is an early signal rather than a confirmed trend. Bitcoin recalibrates difficulty every 2,016 blocks to maintain average block production at one block every 10 minutes. Slower-than-target blocks push the next estimate lower, but block discovery is stochastic—short samples can change sharply even without equivalent changes in underlying computing power.
Mempool's one-month estimated hashrate ranged from roughly 826.1 EH/s to 1.053 ZH/s, with the current estimate at about 937.5 EH/s. The available network series displayed no sustained, obvious decline that would support broad claims of mining shutdowns or equipment migration.
What Could Sustain the Improvement
Three factors will determine whether miners' current relief persists: Bitcoin maintaining its price above the prior modeled hurdle, increased transaction fee contribution, and clearer evidence of reduced network hashrate as the retarget sample matures.
For now, the strongest conclusion remains narrow. Bitcoin's rally more than offset the finalized difficulty increase in a theoretical network-wide calculation, producing a modest gross-revenue reprieve. Weak fees and an immature next-retarget estimate leave the durability of that relief unresolved.
