I've heard people saying that Bitcoin mining is no longer profitable in 2019... but the value of each Bitcoin has risen though, right? I have a gtx 1080, two 1070, and plan to use a 1250w PSU. Will I be able to make some revenues?
I am completely a newbie...
Depends on what algo you have them on, how well you have them tuned, difficulty/net hash, etc.
That said, assuming you are on ethash 24/7 w/ ethlargement pill @ ~ 100 MH/s, gross would be ~ .21 ether a month (at least, as of today. It'll vary).