There is really no Market Collapse / Mining Profitability issue it seems normal to me ups and downs are what mining is all about . right now it seems stable even though BTC price might seem down form the 20k it was at but that's a good thing, it's holding at or around 6 to 8 k stable . that matters more . while the stock market isn't doing so good, i knew/saw that coming .
I normally mine to hold so to me there is no real effect i see .
in fact i just bought a L3 + because the A4 + cost to much for a 100 mh more, i said i would never buy bitmain again an wouldn't have if innosilicon didn't over price there miners so much . I like mining ...
an will keep using my gpu's, A4 not the plus but might sell it for another L3 + or put to a A4 +. .. an buy new stuff as needed and sell off the old stuff as needed . an the A6 is not worth the cost when all it is , is two A4 +'s in one you might be better off looking for single A4 +'s if your a little guy doing it for Fun or work .
May buy one or two V9's from bitmain there at the old s3/S5 price .
Electricity cost no big deal for me and may get even better were looking into solar again so i will be abusing the hell out of it during the day an tone it down at nite some ... if were able to get it this time .
I found the mining profitability of ETH has dropped more than 70% in the last month.