"Owns?" you have no idea how much he has on margin, could be a lot, could be zero, but it is not a foregone conclusion that he has complete control of that stock. Furthermore, read the proxy. The BOD has a great deal, they are not going to let this be sold and lose all of their "goodies." A take out is very remote.
I think Dick was waiting on the outcome of the law suit. Now thats its behind us we may see his bid by the 15th. He owns 71 million shares worth at todays market 875million. Plus his dividend of 13 million..Total is 1 Billion. He will make a play and do it soon. He is also putting up 2 billion of his own cash. IMHO is will happen next ten days or sooner.
I looked up Richard Schulze on the Forbes 400 list. That list says he is worth about $1.5 billion and that was back when BBY was about $18 per share. Forbes doesn't agree with your comment about him having another $2 billion on the side.