Ethereum will be switching from proof of work to proof of stake very soon.
If you’re currently looking to buy ETH mining hardware, I’d say go for it. If you do decide to make the purchase, understand you won’t be using it for much longer. When purchasing, make sure the card is able to mine other currencies profitably as well because you’ll have to look elsewhere in the future. Until then, try to rake in as much ETH as you possibly can!
FULL TEXT: https://usethebitcoin.com/ethereums-switch-proof-work-proof-stake/