Right. My point in saying "all banks would fail if there were a run on them" is just that if for some reason, every depositor at JP Morgan were to decide to wi

Right. My point in saying "all banks would fail if there were a run on them" is just that if for some reason, every depositor at JP Morgan were to decide to withdraw their deposits on Monday in favor of some other bank, JP Morgan would fail. There are so so many reasons that won't happen, but the statement is true and is useful to keep in mind when thinking about banks and the banking system.