I believe for Russia to have a bold step to invade their neighbour Ukraine, they already know what Is going to happen and they are fully prepared for it. Before now Russia has worked on their economy very well that if anything happens the economy will not have much effect, since Russia invasion to Ukraine with all the sanctions giving to Russia their economy is not crashing down. I think Russia can survive sanctions giving to them.
everything they done,must be prepared and calculated before.impossible starting the war but they have no preparation if their country get alot sanction from countries around the world. although alot consequence they will took by this war, they still stand for their principle. evenmore almost countries around the world face inflation due this sanction and looks like it become boomerang for the west.