Amazon is making a habit of crushing Wall Street's expectations. There are nine American companies with valuations of $1 trillion or more right now, but only three have crossed the$3 trillion milestone: Amazon (AMZN 2.93%) could be set to join that ultra-exclusive club thanks to its soaring earnings growth, and its expanding use of artificial intelligence (AI) across its cloud computing and e-commerce businesses. The company's market capitalization is $2.36 trillion as of this writing (Aug. 12), so its sto ...