Alphabet could become the world's largest company in the coming years.Alphabet (GOOGL 1.13%) (GOOG 1.04%) is already one of the biggest companies in the world, but there is no reason to think it couldn't become much bigger. With a market cap of about $2.8 trillion, it has a real shot at becoming the next$4 trillion stock and possibly the largest company in the world one day.The recent court ruling that let it keep its search advantages pulled a big risk off the table, and the company now has multiple growt ...