Time to take a trip to Switzerland.
Switstikaland? Might better just burrow a ways toward it.
Swiss banks are now required to report on US citizens - I had an account there at UBS while working there and they simply told me they were closing my account since I was from the US, and even though I signed a document allowing them to disclose everything to the US Government regarding my meager account they didn’t want to have any US accounts.
I understand safe deposit boxes there may be OK - never had one there so don’t know if there are any restrictions.