What, why it's impossible for a multi billionaire to go bankrupt literally overnight?
There are dozens of reasons, but the easiest ones to explain are:
1.) Diversification- anyone with THAT much money splits it into short and long term assets, puts it into "non liquid" forms like physical plants, patent portfolios, part ownership in other companies, and real estate investments that could not be sold easily, etc- meaning selling all of it instantly is impossible. It's also likely that wayne holds a significant amount of restricted company stock, or stock options that can't be sold for an indeterminate amount of time- 5 years, 10 years, whatever. This is really common in the business world.
2.) The stock market is a "virtual" entity, and can and has been "rolled back" in the event of "flash crashes", resetting the market. A literal attack on an exchange combined with a massive multibillion dollar sale in the middle of the night would raise all kinds of flags.
3.)Tying into the above, There are also "circuit breakers" built in to the market. The majority of trades done now are done by high speed algorithms, not individual traders. a large scale sell (remember, bruce is a multibillionaire) would cause these algorithms to go into full scale sell mode (anticipating some kind of market crash), triggering a "flash crash" and tripping a circuit breaker, freezing all trade. This actually happened a couple of years ago when a trader messed up and sold an impossibly large number of shares of something.
4.) The wealth of the corporation and the wealth of the individual are kept separate. Even if through some bizarre event wayne enterprises as a corporation went bankrupt overnight (say, being sued out of oblivion), wayne's personal fortune would be untouchable, and vice versa. It's possible (though extremely implausible) that one or the other could go bankrupt, but not both at once.
can a guy that's worth tens of millions waste his cash on hookers and blow and go bankrupt overnight? sure. Tens of BILLIONS? not really. Would take a miracle, or really bad writing.