Ok, I will try to make this concise: When the USSR existed, their currency was the Soviet Ruble. Therefore, I am assuming any monetary holdings or savings a citizen of the USSR would have had would have been in the Soviet Ruble, whether they were in the Russian SFSR, Azeri SFSR, Kazakh SFSR, etc.. So with the dissolution of the USSR and its splitting into the 15 different republics with different currencies, what happened to people's savings? Did their holdings in the Soviet Ruble now become worthless? Or, how were their holdings transferred into these new currencies? There is a disparity in the value of the currencies of the countries of the former USSR and size of their economies, so how did that affect what happened to people?
I hope that question makes sense. I tried to reduce as much garble as possible.
Ukrainian karbovanets was introduced at 1:1 exchange rate with the Soviet ruble. 4 years later it was replaced with Ukrainian hryvnya at 100000:1 exchange rate.
Russian ruble was also introduced at 1:1 exchange rate. In 1998, it was denominated at 1000:1 rate.
Belorussian ruble was introduced at 10:1 exchange rate. In 2000, it was denominated at 1000:1 rate.
Estonian kroon was introduced at 10:1 exchange rate and quickly pegged to the German mark.
As you can see, some countries have been more successful than the others. However, in 1992 the Soviet ruble had already suffered from hyperinflation that had destroyed most of the savings Soviet citizens had.