What miner is most profitable?

1. Ethereum (ETH) Ethereum is the second-most valuable cryptocurrency in existence next to Bitcoin. Ethereum is, more or less, the most profitable crypto to mine at the moment due to its price, and is considerably easier and less time-consuming to mine than Bitcoin.

Profitability of the AvalonMiner A1166 Pro is estimated to be $2.77 per day, $83.10 per month, and $1,011.05 per year with current energy and crypto prices, which clearly makes the A1166 Pro one of the most lucrative ASICs.24 Eyl 2021

Around 2 to 3 years in practise . After that, either the device has “burned out”. Or it is competing against so many others that it no longer calculates the hashes fast enough to receive a profitable fee. You can actually estimate it by just looking at the prices these things go for.