The 280X makes only 70% from what it made back in Feb 10th, so I guess after the huge pump and huge difficulty increase, its still pretty impressive.
The thing that scares me is people chase profit who make asic chips. There were X11's being ran that we did not know about when the asics were made, due to keeping them private. Now you can buy an asic that does X11 due to them being used and they already made money back selling is just a bonus.
I think if ETH remains profitable you can count on someone trying to make asic chips for it. How long it takes.. and if it remains private we will not know. But I hate that possibility of dropping money on GPU and an asic can come out and blow it away.
It should be Okay, ETH is planned to go to PoS SoonTM. If you care for the value of Eth anyways. For continuing mining, though, tough luck. But thats where GPUs shine.
I am now running 150 mh
How long before we go to pos.
at the end of this year, or early next years, still many months ahead