By most conventional definitions, Apple (NASDAQ: AAPL) is the most successful company in the world. It's worth more than any other publicly traded company, with a market value near $1.1 trillion, and it's the most profitable, bringing in $56 billion in net income in its last four quarters.Apple is making headlines once again after releasing the latest versions of its flagship smartphone, the iPhone, including the iPhone XS, XS Max, and XR; the stock recently topped the $1 trillion mark and is pushing record highs.