Putin is in favor of establishing bitcoin as a kind of money since he is threatening war and Biden's economic penalties will harm the ruble. He might still use bitcoin to transact in the global economy. I'd want to hear everyone's thoughts on this. Thanks for your response in advance

The truth is BTC can replace fiat currencies on a much bigger transactions like import and export between countries as of today, so I don't think that BTC can solve the problem.
Another point is that the US government can decide to ban BTC as a matter of national security if by any chance Russian federation have a bit of success in using bitcoin to carry-out transactions. Let's face it, BTC as of today is best for peer to peer txs and a store of value.