@PlanetKing as @rrsdove said above, put your rig details in to What to Mine and it will give you an idea of what’s the most profitable at any particular time. While Ethereum has been far and away the most profitable GPU mineable coin for over a year now, as you mention it will change.
My advice though is read up a bit more on the Eth2 plan so that you don’t lose out on mining it until the very end. There are lots of resources but this one talks about the recent Berlin Hard Fork and the upcoming London Hard Fork https://academy.ivanontech.com/blog/the-ultimate-guide-to-the-ethereum-berlin-hard-fork-and-london-hard-fork
The current plan is to implement the Ethereum London Hard Fork in July (not stop the POW process) so make sure you understand the difference. From what I can gather, this will make Eth less profitable than it currently is (with most estimates at about 30% less profitable) but it will still be able to be mined for many months yet (or maybe years).
The plan is to transfer from POW to POS early next year, but you only have to look at the history of the Eth development to notice that they have never yet met an estimated implementation timeline.
So, after the July hard fork (if it even happens on time) make sure that you compare your earnings pre- and post- implementation and see how much difference that makes to your profitability. Also, visit whattomine.com and re-evaluate your rig’s performance, although I’m not sure how long it will take for the data on the site to reflect reduced profitability after the hard fork (it might be immediate or it might take some time for the changes to flow through).