A guy I know works for a privately held company (owned 100% by one man) that deals solely in a special class of investments which, by federal law, generate tax free income for the investors.
The inflow and outflow of money creates an average balance that makes the company the 2nd largest depositor in a bank with over 1500 branches. From what he told me, their average balance is over a hundred million dollars.
A few years back, the owner of the company sat down with the officers and directors of the bank (he has refused a board position himself) and told them he'd identified certain areas in the financial markets where he saw potential problems and risk that far outweighed potential gains. As a result, he was putting them on notice that, while they were free to run their business as they pleased, if he learned of them playing in any of the sandboxes he'd mentioned, he would immediately pull all the company's money elsewhere, regardless of any reason or justification they may have for their actions.
The money they have in that bank is an operating account, while the bulk of the funds are directly controlled by the company. The owner of the company kept the funds they control clear of the same areas he identified as too risky as well.
Evidently they looked at the string of zeros on his account balance and decided they didn't want to lose it. Maybe it was his threat, or maybe they're just averse to high risk stuff with promises of quick bucks, but for whatever reason that bank has zero involvement in any of this current mess, according to my friend.
30 or 40 years ago you could've made a safe assumption that a bank wasn't going to do anything wild or stupid with your money. It says a lot about what the financial industry has devolved to today, when it takes someone in control of that much money to threaten them in order to keep them doing what they oughta be doing anyway.