Once revered as the epitome of innovation, the market seems now to believe Apple's (AAPL 0.53%) best days could be behind it. Given the stock is still hovering close to the $400 range it has clung to over the last few months, investors are more than justified in their growing frustration. However, the company has signaled it believes it still has an ace or two up its sleeve. So are shares of Apple still worth holding onto? In this edition of our Ask a Fool series, Fool contributor Andrew Tonner gives his views on where Apple should be headed over the long term and why this company's historic run might not be over just yet.