thx for your answer,
but why are you guys mining bitcoin when altcoin like ETH looks more profitable, what do i miss ?
you missed nothing
many of the miners have fingers in both pies
they mine both bitcoins and altcoins,using ,for example, s9 to mine bitcoins and GPU or Baikal miners to mine altcoins
mind you,altcoins have not been that profitable to mine a couple of months ago,it is due to the recent price rise of ETH,DASH,LTC
that altcoin miners started to be more profitable than sha256 miners