In any case it won't stop him from continuing his anschluss of Ukraine at this very moment.
Oh no, he could crush Ukraine for now but that does not guarantee a definitive victory. But think about the hate Ukrainians have for Russian oppression, they’d stay quiet for a while if needed (for lack of viable options) but at the next chance they’d stab their captor in their back in a moment of weakness. Brothers they will never be by force.
Longer term? Maybe. Enough pressure on those in power will erode Putin’ support base. Cut off enough of his wealth and he’ll have a harder time holding on to power.