CryptoQuant CEO: MARA, the Largest Bitcoin Miner, Costs an Average of $62,900 to Mine One BTC Ki Young Ju, CEO of on-chain data platform CryptoQuant, posted that according to the latest Q3 report from MARA, the world's largest publicly traded Bitcoin miner, the average cost of mining one BTC is $62,862. As of today, the price of BTC is around $74,600. MARA's Q3 net profit was $634 million, primarily from the appreciation of its BTC holdings. After Q3, MARA sold 13,597 BTC at an average price of approximately $81,039, realizing about $1.1 billion, of which $750 million was used to repay loans secured by BTC.