I have been reading articles that when Etherium 2.0 is released in 2020 you will not be able to mine Etherium with GPU miners. Is this a definite thing or is it still just up in the air?
If we will no longer be able to mine Etherium does this officially make GPU miners irrelevant? Or is it still worth building them for @ home solutions to mine other coins and possibly new coins that could be profitable?

I currently have an 8 RX580 rig that can't really mine anything profitable except for Etherium. (not sure if this rig will be useless in 2020 or not).

I am looking to build another rig with 8 GTX 1070ti cards that will give me more flexibility to mine other algorithms.

Would it be foolish to buy 8 brand new GTX 1070ti cards at $479.99 a pop and build a $5000 rig with the future of GPU mining and where it stands? Even if I buy used the rig will cost about $3800. Just trying to see what peoples thoughts are on this. I am willing to gamble, but don't want to gamble if there is no chance GPU mining will be relevant within the next 2-3 years and we already know this.


If someone can give me an idea of what I am gambling on by continuing to expand my GPU miners in 2019 that would be great.