Yes they will. In fact, it's already begun. Russia has been loading up on cheaper U.S. treasuries to rearm for the next attempt on its currency. The problem is they have become mostly immune to the normal hybrid attacks due to the low percentage of dollar-denominated debt in country.

They have their SWIFT alternative and national payment card system. The most telling thing about the opposition to these sanctions was VISA and MasterCard. They know that once they lose this business they will never get it back.