ANTMINER E9 is designed specifically for ethereum mining cryptocurrency.  In these times, I would not be recommended the ASIC e9 ethereum miner.   The ASIC ethereum ANTMINER E9 is a good idea but should of come years ago.

If ethereum does go to proof-of-stake then the ethereum e9 device will be rendered useless anyway.  The ASIC ANTMINER E9 for ethereum would only last a year or two.  To some might be worth it but it would really depend on what your financial circumstances look like.  If you have the setup and available finances then why not.  But GPU mining would be more flexible and more reliable because you can mine practically any coin on the cryptocurrency network. e.g. Ethereum Classic, Vertcoin, Ravencoin, Ryo and much more. 


The purchase of the ethreum ANTMINER E9 is not a very good idea. Not sure what BITMAIN is playing at?

Cryptocurrency Unlimited 

Bitmain Reveals New Antminer E9 Ethereum Miner, ASIC Device Commands 3 GH/s Hashrate


0.85 J/M

2556 WATTS

Antminer E9 Mining Rig to Command 3 GH/s of Hashpower