Also at the same time, I also saw some posts saying that ZK mining may replace the previous eth pow mining in the future
At this point. It's still just speculation. Let say some projects adopt ZK mining,
1. are they going to be as widely adopted as Ethereum was? (ETH's wide adoption is the reason it was so profitable)
2. Will they grow astronomically in price and stay somewhere up there even in a bear market, like ETH did from the time of its inception?
So there will be so many factors at play before we even think about that high profitability that ETH POW mining offered