Privacy

In case of domestic violence, you go to the police.

This was such an oddly specific "worry" that it kind of plays the hand of the target demographic as well as the intention of the snippet. Along with the weird bits about birthday cards and ice cream, it just screams propaganda for midwest Christian-leaning grandmothers and housewives.

Right-wing, conservative Christian housewives who hand-wring about everything ALL put away stashes of money to hide from their 1-dimensional husbands who are usually somewhere on the abusive spectrum. I lived much of my life out in the outskirts of cities where the rednecks nest and breed, there are some very predictable stereotypes out there. One of the most common talking points on the far-right Christian slice of America is the perpetual warning that the Anti-Christ is going to take control of all the money and bring the entire planet under his control, and he will enact a one-world currency, take away everyone's cash and guns and then everyone will have to get some chip in their wrist and that will be the Mark of the Beast, blah blah blah, fear-mongering and superstition and mindless worry.

Nobody will ever take away physical money entirely because the moment you do, people will invent one. So if you don't want unregulated Nuka Cola bottlecaps being traded for goods and services in your country, you need to maintain an official currency.