“the West is freezing Russia's international reserves (of the Central Bank, $630b). There is nothing more to support the rouble. Turn on the printing press. Hyperinflation and economic catastrophe are just around the corner.”
They can't freeze it all. It is spread out and a good chunk of it is in physical gold. They froze a large chunk of it. There's probably an analysis out if you google it but the point is they will still have money to prop up the rouble.