Hi dude , btw good post , let me share my own experience about ETH mining, as you know ETH mining is through GPU cards, just a two months before once ETH prices go's high more peoples come to mining side due to this GPU cards are short in market due to more demand, in Nov or Dec ETH will move to from PoW to PoS thats why ETH mining will not be easy for every GPU miners, if you want to know what is PoW and PoS search it , after that if you want to invest in GPU mining .