While Wall Street fretted about Google losing the AI race to ChatGPT around three years ago, Alphabet (NASDAQ: GOOGL) quietly built something far more valuable: an empire worth US$3 trillion.The search giant just became the fourth company to reach this milestone, joining Nvidia (NASDAQ: NVDA), Microsoft (NASDAQ: MSFT), and Apple (NASDAQ: AAPL) in tech’s most exclusive club.Here’s how Google’s parent turned doubters into believers – and why the best may be yet to come.Reason #1: The Invisible Empire Beneath ...