According to the Planet Daily, the bear market continues to compress the profit margins of all segments of the cryptocurrency market, and mining, which plays the role of cryptocurrency producer, is no exception. Take Bitcoin, which accounts for half of the cryptocurrency, as an example. Its overall mining revenue in February 2019 was only $190 million, down 10% from the beginning of the year. Even so, the mining companies that operate in an enterprise still maintain high profits. According to Diar research, the profit margin of “Big Miners” in October 2018 remained at 59%. In contrast to the “big miners”, “personal miners” have been “unprofitable” since September 2018.