Should investors buy these hot growth stocks in anticipation of more upside?Artificial intelligence (AI) stocks were in fine form on the market in the first half of 2024, with key names that are benefiting from the proliferation of this technology outpacing the broader index by a wide margin.Shares of Nvidia (NVDA 1.92%), for instance, are up 154% in the first six months of the year. Palantir Technologies (PLTR 0.64%) clocked 58% gains, while Micron Technology (MU 2.61%) has also turned in a strong performa ...