The mining industry is probably the oldest activity related to cryptocurrency. It all began in 2009, when Satoshi Nakamoto generated the first block on the Bitcoin network.
Today, mining is an entire industry which spans 114 countries around the world, and restlessly ensures the functioning of the global network of cryptocurrencies. According to Blockchain.info analytics, the total profitability of the market over the past year comprised $4.1 billion. This figure doesn't include the income earned from the sale of mining equipment, which is estimated to reach some $3-4 billion, as is the case of industry giant Bitmain.
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