GPU mining will last as long as there will be crypto-currencies. That will always be profitable for someone 
! Plus we all thought GPU mining was dead, but Ethereum revived it two times. And yet that is sure there will not be a third time because of Casper, there will still be some coin a day or another, just as ZCash, that will pop up out of nowhere and will be profitable.
! Plus we all thought GPU mining was dead, but Ethereum revived it two times. And yet that is sure there will not be a third time because of Casper, there will still be some coin a day or another, just as ZCash, that will pop up out of nowhere and will be profitable.