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
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
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