I'm a bit surprised these sanctions have been so effective. Several of Russia's major oil companies (gov't run Gazprom and privately run Lukoil) have completely cratered, and this means that a bunch of powerful and prsently much less wealthy oligarchs are really pissed. Putin has to worry about hanging from a lamppost, if he's not careful.
It looks like he gravely miscalculated. Ukraine was supposed to implode immediately, and Europe was supposed to go along with it because they are dependent on Russia for 35% of their energy. IMO, that was a reasonable assumption, but he was wrong, and now he's in big trouble. Even if he captures Ukraine, he'll be dealing with an insurgency, and young Russian conscripts will be returning home in coffins.