How about a BANK!!

People tended not to use the bank much in those days.

It's that man again!!

The film is set in the 1964. Selma had moved to the US as an adult, with her son, after having lived in Communist Czechoslovakia.

Many ordinary people did not trust banks in the former Eastern Bloc. The banking was controlled by the Communist governments of the countries. There was a risk that the money an ordinary citizen had placed in a bank might end up getting confiscated by the government for various reasons that would sound completely unreasonable to someone who has grown up in the Western world. That's why in the Eastern Bloc many people stored saved cash in some secret hiding places at home.

During the time she had lived under a Communist regime, Selma had learned that it was putting money in a bank that carried a huge risk, and that it was much safer to hide large sums of money at home. Even though she had moved to the US, she obviously hadn't been able to get rid of her deep distrust of banks. Similar behaviour has been observed in people who have fled as refugees from a country with corrupt, extrajudicial police force and government officials — even after settling down in a country within the free world, with incorrupt and just legal system, it's very hard or even impossible for them to learn to trust the police or government officials.

So, the choice Selma had made was completely sensible regarding her background.

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"These go to eleven."