Its still a thing (as others have mentioned ETH) but its not quite the same as 2017/2018.  Back then new shitcoins were popping up daily, along with a steady stream of coins that may be more profitable depending on what GPU you had.  Those days are pretty much gone.  A lot of those coins went to asic and there isn't the influx of new coins.  Right now ETH is about the only game in town if you have a card with more than 4 GB of RAM.