Bitcoin extraction is the method by which new bitcoins are produced and transactions are verified on the blockchain . Essentially, individuals use powerful computers to solve complex cryptographic problems. https://www.theglobeandmail.com/investing/markets/markets-news/TheNewswire.com/34823378/btc-mining-cryptocurrency-mining-and-monero-mining-hashj-cloud-mining-technology-satisfies-your-ambitions/