Here's why AppLovin stock could still have a lot of upside, even after a whopping 650% gain this year.Palantir Technologies (PLTR 4.87%) is one of the hottest stocks of 2024, but I think there is another hot artificial intelligence (AI) software stock that investors should consider as well. AppLovin's (APP 4.74%) stock price is up more than 650% so far this year, far outpacing the stellar 250% gain seen in Palantir's stock (all returns are as of this writing).While Palantir is getting plenty of attention be ...