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