When it comes to AML/KYC you get effectively zero government guarantees. It’s almost the opposite.

I agree in the sense of FDIC insurance and being nominally operating under the banking regulatory system - but those typically offer exactly zero protection to a whole category of not-crimes.

A bank can decide you are suspicious and simply freeze your accounts indefinitely - and stonewall you at the customer service level. It’s not like they are required by any law to respond to you or anything like that.

There is likely more recourse if you have enough funds worth perusing legal action to its final conclusion - if you win then you can be more assured the bank will exist six years later when your judgement finally hits. Enjoy paying those legal bills though.

Having witnessed this happen and seen six figure losses due to absolutely zero crime being committed, I basically operate under the mental model that any money within a bank or financial institution is their money and not yours.