Bitcoin Mining Faces Dual Challenge as Network Hashrate Peaks and Inner Mongolia Crackdown Intensifies

The Bitcoin mining industry found itself at a critical crossroads on April 28, 2021, as the network’s hashrate hovered near all-time highs around 150 to 180 exahashes per second while China’s Inner Mongolia region intensified its crackdown on cryptocurrency mining operations. The juxtaposition of record-breaking network security and growing regulatory pressure underscored the complex dynamics shaping the mining landscape during one of Bitcoin’s most transformative periods.

TL;DR

• Bitcoin’s network hashrate sat near all-time highs of approximately 150–180 EH/s in late April 2021
• Inner Mongolia escalated its anti-mining crackdown, threatening China’s dominant position in global Bitcoin mining
• Mining difficulty was near record levels in the 23–25 trillion range, reflecting intense competition among miners
• Gaming giant Nexon purchased 1,717 BTC worth $100 million, signaling growing institutional confidence
• BTC traded at $54,824 while transaction fees averaged $14.31 per transfer

Hashrate at Record Levels Despite Growing Threats

By late April 2021, Bitcoin’s network hashrate was operating at levels that would have been unimaginable just a year earlier. The computational power dedicated to securing the network and processing transactions had surged past 150 exahashes per second, a testament to the massive capital flowing into mining infrastructure worldwide. This exponential growth in hashrate directly correlated with the bull market that had propelled Bitcoin from around $10,000 in September 2020 to nearly $55,000 by April 2021.

The mining difficulty, which adjusts approximately every two weeks to maintain a consistent ten-minute block time, had climbed into the 23–25 trillion range. This meant that miners needed exponentially more computational power to solve blocks compared to previous years. The rising difficulty reflected the profitability of mining at current Bitcoin prices and the continued deployment of next-generation ASIC mining hardware, particularly Bitmain’s Antminer S19 series and MicroBT’s Whatsminer M30 series.

However, the concentration of this hashrate presented a significant vulnerability. China still controlled approximately 65 percent of the global Bitcoin mining hashrate in April 2021, with regions like Xinjiang, Sichuan, and Inner Mongolia serving as major mining hubs due to their abundant and often cheap electricity supplies.

Inner Mongolia Draws the Line

On April 28, 2021, reports emerged that Inner Mongolia was escalating its campaign against cryptocurrency mining operations. The region, which had been one of the largest Bitcoin mining centers in the world due to its cheap coal-powered electricity, was moving to implement stricter measures to shut down mining facilities. This crackdown was driven by China’s broader environmental goals and concerns about the energy-intensive nature of proof-of-work mining.

The Inner Mongolia crackdown was particularly significant because the region accounted for an estimated 8 to 12 percent of global Bitcoin mining hashrate. The provincial government had already announced plans in March 2021 to ban new mining operations, and by late April, authorities were moving to enforce these restrictions more aggressively. Mining operations in the region were given deadlines to cease activities, and electricity providers were ordered to cut power to known mining facilities.

The immediate impact on Bitcoin’s network was minimal on April 28 itself, as many operations continued running while assessing the situation. However, the writing was on the wall for what would become a massive migration of mining operations out of China in the months that followed, ultimately leading to a significant but temporary drop in network hashrate by mid-2021.

Institutional Demand Creates Counterweight

While the mining sector faced regulatory headwinds, institutional adoption of Bitcoin continued to accelerate. Japanese gaming giant Nexon announced on April 28 that it had purchased 1,717 Bitcoin for approximately $100 million, marking the largest cryptocurrency acquisition by a Japan-listed company. The purchase represented less than 2 percent of Nexon’s total cash reserves, signaling a measured but meaningful commitment to Bitcoin as a treasury reserve asset.

The Nexon acquisition was part of a broader trend of corporate Bitcoin adoption that had been gaining momentum since MicroStrategy’s initial $250 million purchase in August 2020, followed by Tesla’s $1.5 billion Bitcoin acquisition in February 2021. Each new corporate buyer added credibility to Bitcoin’s narrative as a legitimate store of value and, importantly for miners, created sustained demand that supported mining profitability even as difficulty increased.

With Bitcoin trading at $54,824 and mining difficulty at near-record levels, the economics of mining remained strongly favorable on April 28. Block rewards of 6.25 BTC plus transaction fees generated approximately $350,000 in revenue per block, providing ample incentive for miners to continue expanding operations despite the regulatory clouds gathering in China.

Network Fees and Transaction Dynamics

The Bitcoin network’s growing usage was reflected in transaction costs on April 28. The median fee to get a transaction confirmed in the next block stood at approximately $14.31, a significant amount that highlighted the network’s capacity constraints during periods of high demand. For context, the Ethereum network’s median fee was $5.89 on the same day, considerably lower despite Ethereum’s own congestion challenges.

Bitcoin was processing approximately 289,613 transactions per day, while the network settled $75.1 billion in transaction volume over 24 hours. The high fee environment was a double-edged sword for miners: while it increased per-transaction revenue, it also risked pricing out smaller transactions and pushing users toward alternative networks or layer-two solutions.

Why This Matters

April 28, 2021, captured a pivotal moment in Bitcoin mining history. The network’s hashrate was at record levels, demonstrating unprecedented security and investment in mining infrastructure. Simultaneously, the Inner Mongolia crackdown foreshadowed the massive Chinese mining exodus that would reshape the global mining industry within months. The combination of institutional demand from companies like Nexon and robust mining economics created a powerful bull case, even as regulatory risks mounted. For the mining industry, the events of this day highlighted the critical importance of geographic diversification and the growing role of North American and Central Asian mining operations that would soon emerge as the new centers of Bitcoin mining.

Disclaimer: This article is for informational purposes only and does not constitute financial advice. Past performance is not indicative of future results. Always conduct your own research before making investment decisions.