On June 29, 2025, the Bitcoin mining difficulty experienced a significant adjustment at block number 903,168, decreasing sharply by 7.48% to 116.96 trillion. This is the largest decrease since China banned Bitcoin mining in 2021, marking a significant volatility in the global Bitcoin mining network. The main reason comes from some miners in the United States having to suspend operations due to the extreme heatwave, along with unverified reports of power outages in Iran, a region accounting for about 4% of the computing power of the Bitcoin network. This reduction in difficulty will change the mining mechanism and affect the profits of cryptocurrency miners worldwide.
The significance of adjusting Bitcoin mining difficulty
Bitcoin mining difficulty is an important factor reflecting the network strength and the level of competition among miners in solving new blocks. When difficulty decreases, miners can mine Bitcoin more efficiently, which means reduced time and cost to find a new block. Conversely, an increase in difficulty will raise the requirements for computing power and electricity costs.
The 7.48% reduction in difficulty this time provides a certain advantage for miners, helping to balance mining activities when there are changes in the number of participating devices or power supply interruptions. This is also the self-adjusting mechanism of the Bitcoin Blockchain system aimed at maintaining an average block creation time of about 10 minutes.
The main reasons for the reduction in Bitcoin mining difficulty in 2025
The impact of the extreme heatwave in the United States
Recently, many Bitcoin mining facilities in the United States have had to temporarily halt operations due to an intense heatwave that caused cooling systems to be inadequate, increasing the risk of overheating for mining equipment. This has significantly reduced the computing power on the network, directly impacting mining difficulty.
The power outage status in international mining areas
Outside the United States, unverified sources indicate that some miners in Iran, a country accounting for about 4% of the total Bitcoin computing power globally, are also affected by prolonged power outages. This further exacerbates the overall decline in mining power on the network.
The impact of difficulty reduction on the cryptocurrency market
This adjustment in mining difficulty could affect miners' profits as well as the supply-demand balance of Bitcoin in the market. Miners will have better conditions to mine, helping to increase the amount of new circulating Bitcoin. At the same time, the reduced mining costs may encourage some miners to return when the market faces difficulties.
In addition, the volatility in mining activity reflects the distribution of computing power worldwide, contributing to strengthening the Bitcoin Blockchain network to become more resilient and secure against technical and political risks.
How Bitcoin miners adapt to mining difficulty fluctuations
In the context of frequent difficulty adjustments, miners need to have reasonable risk management strategies to optimize profits. Upgrading mining equipment, choosing stable power sources, and minimizing operational costs are prioritized solutions.
In addition, miners also need to closely monitor environmental factors and local policies to promptly respond to sudden changes in the global cryptocurrency mining industry, maintaining their competitive position in an ever-changing market.
Source: https://tintucbitcoin.com/khai-thac-bitcoin-giam-748-hom-qua/
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