A fan bought a 95t S19 Bitcoin mining machine in April 2022, and has now recovered less than half of the cost. He asked me how long it would take to get his money back. Let's make a profit calculation table for S19. The current daily electricity cost of S19 (assuming 0.36 yuan/kWh) is 0.36*3.25*24=28.08 yuan, and the daily output profit is 95÷640000000*3.125*6*24=0.0000667 bitcoins. Referring to the bitcoin price of 65,000 US dollars, the daily profit is 0.0000667*65000*7.3=31.69 yuan, and the daily block reward is 31.69 yuan. Assuming that the charging fee income is 10%, it is 3.169 yuan. The actual daily income is 31.69+3.169-28.08=6.78 yuan, but the income is floating. First, Bitcoin is definitely at a relatively low price in the long run. Second, the income from handling fees will continue to increase in the later period with the popularity of inscriptions and runes. So if it were me, I would probably choose the following strategy: If you don’t have many mining machines, you can choose to hold on for a while, pay the electricity bill yourself, and hold on for a few months. Later, as the exchange rate rises, you can earn more profit. If you have a lot of mining machines, you can choose options for arbitrage and earn part of the electricity bill (the current suitable strategy is to sell Bitcoin at a high price)