Data centers have become one of the artificial intelligence (AI) revolution's hottest must-have trades, thrusting Applied Digital (NASDAQ: APLD), data center construction company, into the spotlight. This sudden swell of bullish attention doesn't come without its risks, though. Chiefly, the stock's big gains since early last year have made it very expensive. And never mind its lack of profits right now and for the foreseeable future. APLD shares are priced at roughly 30 times this year's projected revenue ...