Bitcoin as a digital decentralized currency have been widely criticized by many banks and other financial monolithic characters who have been on for front of global financial system, the latest being the call of central banks governors to the EU for the total ban of bitcoin mining and trading ,this also came a week after the Rusia central bank governor advised the President against cryptocurrency adoption.
In the case of Russia, it was a bluff:
Russian government to legalize its crypto economyBitcoin has come in handy for them now that the US is threatening to take them out of the SWIFT system.
As for the rest of the central banks, I think they will eventually even buy Bitcoin for their reserves. It won't be soon, but they will. When the Bitcoin was born, they didn't even give it any importance. When Bitcoin became bigger they realized the competition it posed and associated it with fraud and scams but they realized they could not stop it and in the end it has been regulated around the world. Now financial institutions that previously associated Bitcoin with scams are preparing custodial services to offer, Bitcoin ETFs, etc. The last step will be for them to buy/mind bitcoin.
Russia would have been smart to adopt Bitcoin some number of years ago when they began clearing out USD from their reserves, but as I've long said, they were too late in their execution.
Putin knew he was going to invade Ukraine presumably for some number of years and was waiting for an opportunity. I don't think he anticipated so much economic isolation in response to his invasion but he knew the U.S. would try to freeze assets in their sanction attempts against Russia, hence emptying out their USD reserves. They swapped it out for Yuan, but the Chinese economy is facing some issues of their own. Doesn't seem like any fiat currency is safe anymore.