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Are Swiss banks expensive or not?

Yes, no doubt about that, for as much as any bank can be considered secure and safe, especially when compared to btc.
Also with Dump Trump insanity in the USA right now? You never know if he will freeze all foreigner balance on American accounts! America first as he said.
 
Honestly US banks are terrible unless you are in the private banking sector which has higher minimums that anywhere else in the world.
Never had any serious problems with any standard (non-private) U.S. bank, just usual minor annoyances that can be solved with a phone call and a bit of patience.