The consumer tech giant is on top with its $3.4 trillion market cap, but this is a painful game of thrones.The battle to command the largest market cap among U.S. exchange-listed companies is a lot like Game of Thrones. Apple (AAPL 1.76%) regained the crown this past summer, after two other "Magnificent Seven" stocks wrestled the market cap leadership title away earlier in 2024.Despite surrendering 12% of its value since hitting an all-time high in the final trading week of 2024, Apple has a comfortable lea ...