Since Ukraine is not part of the EU, it still maintains their own fiat currency. Expecting that Ukraine will impose economic sanctions on the autonomous Republic of Crimea, Russia is rolling in the ATM machines to handle the transition to facilitate Crimea dropping dependence on Kiev’s currency.
One if the IMF recent demands for reform was that the Ukraine Central Bank stop dictating an official exchange rate and allow the free flow of capital at floating rates.
In world conflicts, bankers never seem to be far from the people with the armies.
One of the issues when Virginia voted to secede in 1861 was whether they had a proportionate responsibility for the accumulated debts owed by the United States government. The same issue will be used against Crimea. Debt is slavery.