Yeliz Akmaca 
MARA and Cango expanded their Bitcoin reserves in September as Bitcoin mining reached record levels on October 2–3, 2025. The network hash rate exceeded 1.05 ZH/s while mining difficulty rose 5% to 150.84 trillion.
As of October 2–3, 2025, the total Bitcoin network hash rate surpassed 1.05 ZH/s. Mining difficulty increased 5% to 150.84 trillion (T), providing unprecedented computational power that secures the blockchain. Despite this, the hashprice—revenue per petahash—fell below $50, pressuring miners’ profitability. This is particularly challenging for miners with high energy costs.
Bitcoin Mining Difficulty and Hash Rate: What It Means
Mining difficulty adjusts automatically every 2,016 blocks to maintain an average block time of 10 minutes and to secure the network. The adjustment reflects changes in the network’s hash rate. An increasing hash rate indicates more miners joining the network and using more computational power. This strengthens security but also raises hardware and energy costs.
MARA’s Bitcoin Treasury Reaches $6.4 Billion
U.S.-based Marathon Digital (MARA) added 373 BTC in September, bringing its total Bitcoin reserves to 52,850 BTC, valued at approximately $6.4 billion. The company mined 736 BTC during the month, representing 5.2% of total network miner rewards. MARA increased its hash rate by 1% to 60.4 EH/s and activated all mining containers at its Texas wind farm.
MARA produced 218 blocks in September, a 5% increase from the previous month. With a market value of around $7 billion, MARA is the third-largest publicly traded miner.
Cango Reserves Rise to 5,810 BTC
China-based Cango mined and held 616.6 BTC in September, raising its total Bitcoin treasury to 5,810 BTC (~$700 million). The company operates at a 50 EH/s hash rate, efficiently utilizing 89.7% of its capacity. CEO Paul Yu noted that this performance provides a strategic foundation for expansion into high-performance computing (HPC). According to Bitcoin Treasuries, Cango ranks 18th among publicly traded companies.
Bitcoin Price and Market Outlook
Bitcoin is currently trading at $120,373. Public mining companies’ BTC reserves are as follows:
- Strategy (Michael Saylor): 640,031 BTC – $77 billion
- MARA: 52,850 BTC – $6.4 billion
- Tether-backed Twenty One: 43,514 BTC
- Metaplanet: 30,823 BTC
- Bitcoin Standard Treasury: 30,021 BTC
This data highlights that institutional accumulation of Bitcoin continues, with mining companies playing a critical role in the ecosystem.
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