No idea why you are thinking that.
Looking at whattomine.com there are still 6+ coins that are close to ETH mining profits.
And another 15 or so that will still generate some good money.
At a guess those will get crushed, but some others will probably come back up.
Monero and similar are my guess.
Not going to worry about it.
FYI there are dozens of similar posts about this very thing if you want to search a bit.
-Dave
Agreed. I don't expect GPU mining to suddenly stop because ETH went PoS. If anything, you may see an explosion in price of a coin like Ravencoin to enable the market to move on to the next thing. If you were looking at selling your rigs, the time is already behind us. Prices of ETH are on the rise and prices of GPUs are on the decline for more than a month now. As the price of ETH rises more and GPUs continue to fall in price, you get a double loss on what you could have sold them for. No amount of mining in this period will make up for that loss. So basically, if you're planning to sell your rigs, do so ASAP. If you're planning to continue mining, don't worry about it. The market will create opportunities. That's what it does.