At the time when msft kills AAPL or when AAPL fails its application by itself, the best time to short AAPL.
AAPL is a hard stock to play at this moment. msft, goog and the whole world just started to compete. AAPL is still taking the market.
BUT AAPL is doing a very risky business. stock overprice, single product, any little mistakes are made in its budiness, AAPL will go down like waterfall.