Well there is a sanction on their gas and oil, I think the only way for Russia to make business is to use othrr options. Before this BTC legalization, they were excluding USD by only using EUR. Bitcoin would make sense if they couldn't make transactions using EUR anymore.
Whatever Russia.does for BITCOIN to have adoption in their region is going to be great for crypto investors.
These sanctions are not just only from the US but the EU and other countries too have pronounced these sanctions on Russia so the option you think of them using the EUR is out of the question and even if they decided to adopt Bitcoin as a currency today which I don't think was their target but looking at if Bitcoin mining would be regulated or banned, I don't think that they could spend Bitcoin on the most essential things they might need during this time.