Why should MS sell XBox & Bing?

MS is sitting on a cash pile of $82 billion. Only Apple has more(approx 2x that). Given that XBox is now profitable and Bing is projected to break even in 1-2 years, why should MS gut it's future for some short-term extra profits that it doesn't need? People are talking about MS as though it's on it's last legs, but that $82 billion is saying otherwise.