According to BlockBeats news, on the evening of November 22, the price of bitcoin briefly dropped below $7,000, down 10% in 24 hours, while some bitcoin miners were close to or even close to the shutdown price.
According to the shutdown currency price data of fishpond, there have been 4 mining machines that have reached the shutdown currency price, namely M3, avalon A741, wingbit E9+, and ant T9+. On the market, the mainstream ant S9 mining mechanical and electrical charges have reached 94%, miners using S9 mining machine mining has almost no profit.
This year's new machines, the M20 and the ant S17, account for nearly 50 percent of the electricity bill, and the miners are only twice as profitable.

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