It's a generic question, about mining with GPUs
Usually the best coin to mine with GPUs is the most profitable, and if you desire another coin to hold, you can buy with the coins you mined
You can check here:
https://whattomine.com/coinsPut your GPU and this site will show you the most profitable ones to mine
Most of the time, ETH is the coin which will give you more profits
And I want to say there are a lot of approachs, you can mine to hold some coins you like, you can mine to help secure the network, you can mine on nicehash and be paid in BTC, you can mine fresh new coins before anyone to have more coins etc