Russia started off the invasion with equivalent of $670 billion in monetary reserves. $340 was in Western banks and is frozen. Ther burn rate has been large and Russia has been financing Pooty's special military operation with these funds. Russia will have spent the last of it with in about 12 to 18 months. Then it is crunch time. Russia can no longer borrow money, or get foreign investments. The clock is ticking.
OK, what about Ukraine finances?
And EU, don't forget EU, Germany especially.
Last time I checked, EU critters were complaining that Russia actually earns more because of gas prices, not less.
Your whole damn idea behind this war you started was to sanction Russia to death.
It has not happened and it's not going to any time soon. Your own eggheads are now writing theses about it now. It utterly failed.