Just to poop on the party even more - once eth goes PoS, the difficulty of all other coins will jump by around 4x since around 75% of all GPU mining power is doing eth right now.
4x? that would be amazing. But the reality is more like 100x
I don't think you realize how much hashpower is behind ETH right now and how little is behind any other coin
1.5 millions gpu are behind etheruem and 500k on all the other coins combined, but the price can increase a lot after bitcoin go boom again, so it must be seen, also someone will sell his rig for sure, after eth go pos i'm sure on this