Bitcoin Mining Sees Its Sharpest Difficulty Drop Since 2021

• Bitcoin mining difficulty dropped 7.5%, marking the largest adjustment since China’s mining ban in 2021.
• Global hashrate plunged due to extreme heat and power cuts, triggering an automatic difficulty correction.

The Bitcoin network has just undergone an unusual adjustment. At the end of June 2025, the mining difficulty level dropped by around 7.5%, according to Bitbo. Not a small number, this decrease is even the largest since the Chinese government banned crypto mining in 2021. For miners, this could be good news and a reminder that this industry is indeed full of surprises.

Source: Bitbo

Bitcoin Mining Faces Setback Amid Global Heat and Power Woes

This decrease in difficulty comes after the hashrate, aka the total global mining computing power, also fell sharply. Since mid-June, the figure has dropped from 943 EH/s to 800 EH/s. It even touched 684 EH/s, the lowest point in the last eight months.

One of the main causes is the extreme heat wave in areas such as Texas, United States. When the temperature reaches a limit that makes the AC give up, miners have no choice but to turn off their machines. Not to mention the power supply disruption in Iran which adds to the burden.

Furthermore, CNF reported that miners are starting to look restless. In the past week, they have slowly moved their Bitcoin holdings to exchanges. While the amount is not huge—reserves only dropped 0.022%—it still signals that some are preparing for the possibility of deeper price pressure. They may want to be prepared in case market conditions get even more hostile in the near future.

Hashprice Rises, But Not Everyone Is Happy

The difficulty drop, while surprising, has had a short-term positive impact. Hashprice, or the revenue per unit of computing power, rose to $60 per PH/s per day—the highest in five months. That means active miners can breathe a sigh of relief.

But not everyone can be happy right away. Many small miners may not be able to survive if electricity costs continue to soar, especially if the summer heat continues.

However, one interesting thing has emerged from a less-noticed side. Last April, we highlighted that around 70% of Bitcoin mining by 2030 is expected to be powered by renewable energy.

This trend is not just talk. Since 2011, the share of green energy in the mining sector has increased from 20% to 41%. Some companies are even moving their operations to hydro-powered locations. So while there is still a heavy reliance on traditional power grids, the future is clear.

Looking to the other side of the world, Pakistan began looking at Bitcoin last April. The government was exploring the possibility of using mining to reduce its surplus electricity waste and support the nation’s struggling grid. Interestingly, they were even considering a special electricity tariff scheme to attract global mining operators. Imagine a country struggling to stabilize its economy that sees crypto’s potential as a tool, not a threat.