Don't count out the reemerging search and artificial intelligence (AI) giant.Many investors were shocked when Nvidia became the first company to achieve a $4 trillion market cap. The competition for the world's largest market cap was long a contest between Apple and Microsoft, so to see Nvidia emerge out of nowhere likely came as a surprise.Now, the question is, which company is the next to achieve a$4 trillion market cap? Today, Apple has already achieved that, but instead of Microsoft (which previously r ...