[dunkelheit]

There is not much use for dollars in Russia right now other than hoarding them (you can buy goods, but many imports are sanctioned). And after initial panic subsided, trust in the banking system looks quite high so people are less keen on hoarding cash.

Also, if you are an oligarch who plans to load your private plane with suitcases of dollars and fly to the Cayman islands, you are probably sanctioned, so that is out of question too.

[lotusmars]

No problem flying to Dubai to Istanbul and using their banking system. Actually most of Russian and Belarussian elite are happily using it. You can meet all kinds of adult kids of Lukashenko, Yanukovich there or an odd Russian silovik.