It wont matter, they can drop what ever they want, sanctions will screw them.
You probadly missed, that BRIC (most notably China) countries don´t play these sanction pissing games. Russian exports like somebody before me said have intristic value. Gas, oil, metals, food and weapons. There will always be market for those and Europeans are already backpedalling in sanction department.
If you add cold war approach, that Washington assumed against leading BRIC powers, way overbought wallstreet, USD expansionary policy and high debts of western countries - we could be heading towards global economic meltdown (this time no chinese bailout). It could mean megabubble for bitcoin.
It´s not mere speculation. Investment gurus like Mark Spitznagel predicted months ago, that 2014 will be critical for global economy.
http://dealbook.nytimes.com/2013/09/24/a-hedge-fund-manager-who-doesnt-mind-a-losing-bet/?_php=true&_type=blogs&_r=0In short, I agree with original poster. It is highly possible.