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MARA Holdings (NASDAQ: MARA) reported a Q4 2025 net loss of $1.7 billion — compared to net income of $528.3 million a year earlier — as a $1.5 billion decline in the fair value of its Bitcoin (BTC) holdings wiped out operating gains, even as the company announced a joint venture with Starwood Digita

Italy's Guardia di Finanza has uncovered a €500,000 tax evasion operation tied to undeclared Bitcoin and Ethereum (ETH) holdings and a concealed cryptocurrency mining setup. Six individuals across four Italian regions face tax assessments, plus additional administrative penalties on top of the base

Russia's largest Bitcoin (BTC) mining firm entered bankruptcy proceedings after years of financial deterioration and mounting creditor claims. A regional court initiated insolvency supervision against Fox Group, which controls 98% of BitRiver, on Jan. 27. CEO Igor Runets was placed under house arres

Major U.S. Bitcoin (BTC) mining pools have sharply reduced operations as an Arctic winter storm strains electricity grids across the country, with Foundry USA and Luxor collectively cutting more than 110 exahashes per second of hashrate in late January 2026. What Happened: Mining Operations Curtaile

Russian lawmakers propose fines up to 10M rubles ($129,000) for illegal crypto mining amid claims of $100M annual tax losses. Russian lawmakers introduced a bill on January 19 establishing administrative fines for illegal cryptocurrency mining, with penalties reaching up to $130,000 for repeat corpo