One of the primary issues being discussed is the insured limits at banks, and the uncertainty on whether depositors can be made "whole" (it's unclear whether people saying that mean 100% or something close to 100%, so I'm putting it in quotes, some people are being really loose with their terms in this thread). Why the fuck would people, given that context, ever move "all of their money" to only the biggest 3 or 4 institutions and increase their risk by consolidating in exactly the same way that caused the current problems? If anything this is a potential boon for the many smaller banks as they can gain additional depositors as people wise up to their risk exposure.