You can still make a $1/day "ish" profit with a few 1070's. With one 1080 I wouldn't expect to make enough to upgrade the card anytime soon. Then if you can soak the power cost it's just kind of fun to know you're making a few cents a day if your a hobbyist.
I am making some about 4,75-5$ a day with 10x 1070 mining x16r coins right now ...of course in you're miner you should stick to your mined coins and wait undid better times come to sell them