Read into historical novels, like for instance even "Babi Yar" about WWII in Russia, and you will find people writing about using older gold coins for transactions for food etc. in hardship times. The author of Babi Yar was paid a Nicholas II 5 Rubles coin for working for something like a month. If you even had one of those on you during Soviet times you could get shot for hoarding gold. Doesn't stop people from hoarding it and using it, just makes them a lot more careful.
During my last USSR trip in 1991 I had people approach me on the streets wanting to deal in Nicholas II gold coins. They had them, would only sell for dollars of course, no rubles. Those things were illegal to own in the USSR from 1925 until Russia legalised gold ownership ca. 1992-3. But the people that wanted them had them.