[vp4nkov]

This has already started to some degree, starting from today, all russian citizens are banned from sending money over to their overseas accounts, all tax resident companies (and if you are a russian citizen, the only legal way to work for a foreign emplyer from russia is via creating a legal entity which is akin to a 1-man company) must sell 80% of received foreign currencies (this applies to money that was received starting from Jan 1st).

[immibis]

This would be because Russia no longer has that foreign currency, since it was frozen. If 60% of a totalitarian dictatorship's foreign currency is frozen, the dictator is going to make sure that all the foreign currency which the dictatorship does have access to belongs to him.