https://motherboard.vice.com/en_us/article/nedn3d/ethereum-mining-rig-no-longer-worth-it

Back in May I wrote a guide explaining how to build an Ethereum mining rig, a special type of computer that forms the backbone of the Ethereum network and earns ether, the digital currency native to the network, for its owner. Shortly thereafter, Motherboard also made a video documenting this process. Since then, I’ve received countless emails from readers inquiring about my mining rig. I’ve received three such emails this week. The most common question voiced by these readers is whether or not it is still worth it to build a mining rig.

The answer to this question is no. Building an Ethereum mining rig hasn’t been worth it for months and a few months from now, mining ether will be completely obsolete.