There is no way that your 1080ti is mining 1.20$ a day of BTC.
Mining is not dead it is alive and well, you just have to use an Asic if you want to mine BTC. Other than that your GPU can go mine any altcoin out there some of them profitable.
I think its a bit harsh for everyone to push the theory that mining is useless. Also, most mining softwares pay you out in bitcoin so even if your mining monero, you are actually mining bitcoin when all is said and done.
No you still aren't mining BTC. You are trading coins for BTC there is a difference.
This is the best thread I have to help people learning to mine BTC -
https://bitcointalk.org/index.php?topic=4636521.0