Bitcoin remained volatile in February. In this mining difficulty cycle, the total market value of Bitcoin reached a maximum of 143.9 billion US dollars, the lowest was 119.8 billion US dollars, down 24.1 billion US dollars, a decrease of 16.75%. The trend of the whole network computing power, in this mining difficulty cycle, 

         Bitcoin's total network computing power decreased from 42.8869E to 42.2847E, a decrease of 1.4%. We use the current mining machine's mainstream mining machine, Avalon mining machine A841 or ant mining machine S9 (13T) as the standard. At present, the whole network bitcoin computing power is equivalent to mining equipment 3,252,600 units, February 25th. About 21.84 million mining machines were added globally in January.

         The minimum value of the calculation during this difficulty period is 36.7893E, the highest value is 48.9219E, and the maximum amplitude is 32.9786%.

Mining machine price

         Judging from the quotations obtained from the official website of the miners' brands and the secondary market, Bitcoin conducted a 15%-20% price adjustment on the Bitcoin mining machine in February.

1. Bit Continental Ant Mining Machine

         As of February 25, the official price of the ant mining machine S9i-14.5T (bare metal) was US$358, which was flat compared to the previous difficulty cycle. The secondary market price is about US$231.

         The official price of the ant mining machine S11-19T (including electricity) is US$552; compared with US$597 in the previous difficulty cycle, the drop is 7.5%. The secondary market price is about US$350.

         The official price of ant mining machine T15-23T (including electricity) is US$795, compared with US$967 in the previous difficulty cycle.

The decline was 17.8%. The secondary market price is about US$485.

         The official price of the ant mining machine S15-28T (including electricity) is US$1640, which is 17.78% lower than the official price of the previous difficulty cycle of US$1385. The secondary market is about US$695.

2. Jia Nan Zhizhi's Avalon Mining Machine

         As of February 25, the official price of the Avalon mining machine A851-14.5T (bare metal) was US$156, which was flat compared to the previous difficulty cycle. The secondary market is about US$131-US$141.

The Avalon mining machine A921-20T (bare metal) secondary market is about US$216.

         Avalon mining machine A911-19.5T (bare metal) official price of US$267, compared with the previous difficulty cycle price is flat. The secondary market is about US$261-US$265.

         In February, the price of the Avalon mining machine did not change much. The official price of the ant mining machine fell between 10% and 20%, which was smaller than the price difference between the two levels. At present, the market prices of the two miners' brand manufacturers are relatively transparent and the volume is sufficient, and customers can choose the purchase channels according to their own needs.

Mine machine return cycle analysis

         As of February 25, 2019, based on the current currency price, the mine electricity fee was assumed to be US$0.054, and the mining static return period of each brand of mining machine was calculated.

         At present, the average return period of the mainstream Bitcoin mining machine is 463 days, and the average closing price is US$2834.

   Note: The above return period is a static return period, excluding the mining fee, for reference only.

         On the whole, among the current mining machines of the mainstream mining currency, the top three in the cycle are the ant mining machine S11, the Avalon mining machine A841 down-frequency version, and the ant mining machine S15.

         The daily income is higher than US$3, the following models: Shenma mining machine M10, ant mining machine S15, ant mining machine T15, Avalon mining machine A921, Avalon mining machine A911, ant mining machine S11, etc. If miners with low electricity bills can consider buying these mining machines for mining. The domestic mainstream mines have an electricity fee of US$0.054  kWh. These miners can still have revenue. If the miners choose overseas mines like the RHY mine, the electricity cost is lower. It is understood that the RHY mine is in the Middle East. The electricity fee is as low as US$0.027  kWh. If these mining machines are used for mining at a low electricity cost of US$0.027 kWh, the revenue will be even larger.

         In February, bitcoin prices plunged and fell sharply. The highest price was 4216.64 US dollars. After the plunge, the disk oscillated. The current bitcoin price continued to remain around 3800 US dollars. The mining machines of Bitian and Jianan Zhizhi are still in the lead in the return cycle. The two representatives of the ant mining machine S9, Avalon mining machine A921 are in the long-term and will be in a leading position. The Shenma mining machine is slightly weaker than Bitian and Jianan, but still has good performance.

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