Hi,
over one year ago I had to switch my Nvidia 1060 3GB GPUs from Ethereum to Ravencoin. Was a good decision I think and mined a lot.
Since 2 months now RVN difficulty exploded. (Does anyone know the reason?)
So I think I should switch to another coin again now.
Which one would you suggest for my old GPUs?
For your old GPUs I suggest you to sell them and buy new ones, forget ethereum too because this isn't the only one coin which you have to stick especially when you own nvidia cards because you can mine different coins with better profitability than ethereum.
On another hand, if possible, mine on nicehash and hold bitcoins for a while. Can't suggest anything else.