So after the tendies come in.. Are acounts are only 250k insured in brokerages?

Would it be smart to reinvest a lot of it if a safe haven was chosen to invest in? Because if a brokerage falls, from what I've heard is you get all of your shares back.. But only your insured cash up to a certain amount. I'm NOT looking for advice, just sparking a conversation. $AMC Preferred Equity Unit(APE.US)$ $AMC Entertainment(AMC.US)$