Recently it was considered to remove Russia from the Swift network. Sort of the nuclear option amongst sanctions.
http://www.investopedia.com/articles/investing/022315/sanctions-swift-could-hit-russia-where-it-hurts-most.aspThen what would Russia do? Cave in? Send money via courier?
They could just start using the Bitcoin network. It works, it is unstoppable, it cannot be sanctioned. An event like that would make BTC shoot over 10k USD within hours.
Imagine: Natgas, crude oil, gold, and much more, could not be paid via Swift wires anymore. But Europe needs the gas, and the world market needs the crude, the gold, the platinum, the nickel and much more.
It would require Russia (and its trade partners) to buy extremely large numbers of Bitcoins, blasting orderbooks on all exchanges.
I am not saying 1 million is easy to reach, but 10k is nothing, given the very tiny market cap of BTC, compared to networks like Visa, Mastercard or the largest one, Swift.