In early January, 24/7 Wall St. selected South Korean memory producer SK Hynix (000660.KS) as one of our top picks for an AI stock that could double in 2025 . We singled out the stock for two primary reasons: it was cheap, and we believed SK Hynix could continue seeing astonishing growth rates in 2025 and beyond. How cheap was SK Hynix at the beginning of the year? The stock was trading for just 5.4X its next year's estimated profits.