Riot Blockchain mines 425 bitcoins in December, surging 334% Y/Y

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• Riot Blockchain (NASDAQ:RIOT) produces 425 bitcoins (BTC-USD) in Dec. 2021, a 334% jump on a Y/Y basis. The company now holds ~4,889 BTC, all produced by RIOT's self-mining operations.
• In Q4, RIOT mined 1,355 BTC, compared with