The U.S. has already announced incoming sanctions against sensitive electronic imports and senators want fresh restrictions on Russian finance and investments.
The two nations' premiers shared their thoughts on linking payment systems, as Moscow said that no single currency should dominate global trade.
The Russian president said the ban is helping Russian business.
A Ukrainian national was arrested driving into rebel-held Horlivka with hidden cash.
The Kremlin doesn't want to achieve economic growth by softening its foreign policy, empowering the middle class or unleashing a spending spree.
The Kremlin is concerned about losing revenue from oil.
Russia should use cryptocurrency, Andrei Lugovoi said.
More Russians live in poverty now than during the financial crisis of 2008.
Despite a brief respite, Russia is heading for a toxic mixture of stagnation and high inflation.
Half-hearted support for Kiev will allow Russia to divide Europe again.
Pressure is building in Congress to supply weapons to Kiev's beleaguered forces.
In short, it's none of our business. And it's time the Europeans did some heavy lifting.
"Only the poorest people in Russia keep all their assets in rubles."
The Russian ruble fell to record lows early on Friday and many analysts fear that a continuing decline could spark a major currency crisis in Russia