Cipher Mining, a Bitcoin mining company, announced that it has signed an agreement with Bitmain to purchase 37,396 of the latest generation Antminer T21 mining machines. Delivery is expected in the first half of 2025.

On December 18th, Bitcoin mining company Hut 8 signed a temporary agreement with Celsius to build a mining farm and deploy mining machines in Cedarvale, Texas, USA. Hut 8 will build a mining farm that can accommodate 66,000 mining machines and has a power supply of 215 megawatts.

Cathedra Bitcoin, a Bitcoin mining company, announced that it has settled some of its outstanding principal and repaid 2,000,000 Canadian dollars. As of the date of the agreement, the total outstanding principal of the bond is equal to 5,733,728 Canadian dollars. In addition, the maturity date of the remaining principal has been extended by an additional 12 months to November 11, 2025. The bond has not undergone any other changes, and the company will continue to pay quarterly interest at an annual interest rate of 3.5% based on the remaining principal balance until the extended maturity date, at which time the remaining principal will be fully due.

On December 12th, Bitcoin mining company Stronghold Digital Mining announced that it produced 193 BTC in November, with energy income of about $700,000.

Bitcoin mining enterprise Stronghold released its 2023 November operational and financial performance update report, which showed a production of 193 Bitcoins in November and generated about $700,000 in energy revenue, an increase of about 4% compared to the previous month (198 Bitcoins and $100,000 energy revenue).In addition, the company created about $7.2 million in revenue in November, setting a record for the highest monthly revenue in 2023.

Phoenix will acquire water-cooled mining equipment worth over $136 million from WhatsMiner and has the option to purchase an additional $246 million worth of equipment. WhatsMiner's hydraulic cooling equipment series was released in 2022 and, according to the company's website, the current prices range from $1,008 to $2,484.

On December 6th, Iris Energy, a Bitcoin mining company, announced that it will spend $18.6 million to purchase a batch of Bitmain T21 miners (1.3 EH/s).<br>It is reported that Iris Energy's expansion project at the 80MW data center in Childress is still on schedule for gradual delivery from January 2024 to the second quarter of 2024, supporting the company's total computing power to increase to 10 EH/s.

In a case involving cryptocurrency mining and public utility theft, the Minnesota-based power company, Northern Star Cooperative, has accused Ryan Jaenicke and Tina Fehlhaber of stealing a large amount of electricity. During a routine inspection in May 2023, two unauthorized 50 kVA transformers and cryptocurrency mining equipment were discovered. Northern Star has disconnected the unauthorized equipment and reported the case to law enforcement. They are seeking compensation for losses of at least $50,000 and the return of all profits obtained through suspected electricity theft.

German data center and Bitcoin mining operator Northern Data spent $360 million to purchase GPUs to support its cloud computing services. This acquisition was made after Tether provided Northern Data with $609 million in debt financing. The purchase brought the company 384 HPE Cray XD supercomputers, equipped with approximately 8,200 NVIDIA H100 Tensor Core GPUs. The company added that its AI cloud facility is "100% carbon neutral," addressing energy-related issues that plague AI, data centers, and Bitcoin miners.

The co-founders of Bitcoin cloud miner HashFlare, Ivan Turogin and Sergei Potapenko, have been successful in their appeal against extradition to the United States. The two men were facing 18 counts of fraud and money laundering in relation to their operation of HashFlare, which was allegedly a Ponzi scheme with hundreds of thousands of victims and over $575 million paid in. The Tallinn Circuit Court overturned a lower court's order on Nov. 29, citing procedural irregularities and European Court of Justice and European Court of Human Rights practice. The businessmen and their families are set to receive over $110,000 in reimbursement, with the decision open to appeal until Dec. 11.