Blah

Most of his net worth isn't in liquid assets, though. The bulk of his wealth is tied up in securities, since that's how he makes his living. Certainly, one can imagine that the dividends from those stocks and bonds are plenty enough to enrich him, but it isn't like he can just go out and buy a ten billion dollar car at the drop of a hat.

In other words, it's not quite cash in his wallet or sitting in his bank account waiting to be spent. So what?