The trend of mining has ended, the hype the chaos of panic buying of hardware slowdown since mid year. So investing into more gpu is a great idea.
Free electricity and low-cost machines are the passive income I'm in.
BITCOIN hardware has increased
over the last 12 months it went from 7-49th which is a 7x growth of mining rigs
march-may showed least growth but june onwards showed the most
last years gen asics can be bought at 3x-4x cheaper than last years prices and gen gen asics are coming out soon so the growth will continue
GPU? dang your about 4 years too late, or found yourself in the wrong category.. maybe you're talking about altcoins