Russia's approval of bitcoin might be the worst idea since we are watching Ukraine fighting against the Russians. Since Russia approved bitcoin, there is a chance that Russia would use bitcoin to fund the war and probably there is a high chance that Russia would win the war. Hopefully Russia would not use bitcoin to fund their military or else bad things would happen.
In Russia, bitcoin and other crypto-currencies have not yet been legalized for free circulation. Most likely, the cryptocurrency in Russia will no longer be legalized due to the fact that they are taking tough measures to ensure that the currency does not leave the country. And cryptocurrencies will contribute to this. The Putin regime, if necessary, can use bitcoin to circumvent sanctions without the official legalization of cryptocurrency. Therefore, they are not interested in legalization itself.