There are several profitable miners. Some of the top models are Antiminer T19 84T, Whatsminer M30S+ 100T, Whatsminer M31S 80T, Avalon A1246 90T38W. But even with such equipment, you can go into the red if you do not build a mining strategy. Take into account the cost of equipment, electricity consumption, computing power and hash rate. You can calculate asic mining profitability https://minery.io/blog/asic-mining-profitability/ . It is also necessary to choose a profitable crypto coin. To do this, carefully study the market.
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