Anyway, what Ukraine should fear is that Russia decides to reduce its invasion to eastern and southern parts, consolidates there, use the very considerable Russian ethnic presence, especially in the eastern part, and make the Dnipier River, which is supposed to have only limited crossings, a natural barrier and target the Russian guns on Kiev as blackmail... sort of like North Korea does by targeting Seoul. IF Russia is able to achieve those goals--which are in the realm of possibilities--then Russia will have won the war even if at great cost to itself. I believe in that case Russia will eventually ride out the sanctions.