Hard to tell from public information, but I think Eddie will remain a billionaire no matter what happens at Sears.
The kids at these schools are admitted for all kinds of reasons. Some are among the brightest in the world, but they’re a relative small slice. Most of the rest are really bright and/or talented, though - and a noticeable minority are children of really wealthy/prominent people. It serves the interests of the school to have some number of those kinds of kids, which is why they’re there - and sometimes their classmates also benefit from their presence.