$Apple(AAPL)$ Behind the $3 trillion market capitalization is not only the bubble that exists in U.S. technology stocks, but it also shows investors' expectations that Apple can develop the next hot product. However, Apple still faces the problem of being too dependent on iPhone sales. Although Apple has a large amount of cash flow, the iPhone is currently the mobile phone product with the highest profit margin in the world, and Apple also has a strong shareholder return plan, these have made the company's stock price strong. However, Apple still needs to further reduce its reliance on mobile phone sales, accelerate its expansion into businesses such as automobiles and virtual reality, overcome chip shortages and supply chain disruptions, and deal with antitrust scrutiny from global regulators.