Palantir's stock has had a good run, but a reality check is coming.There is no shortage of popular artificial intelligence (AI) stocks. The AI investment theme has boosted many stocks, including energy companies, construction businesses, computing hardware providers, and software companies. Few have been as successful as Palantir (PLTR 0.13%). Palantir's stock has had an incredible run since 2023 started, as the stock has risen by around 2,700%. However, I think Palantir's run could be over.While Palantir's ...