Iran have suffered with far too much Western meddling over the years, mostly from the US and Britain.  As far as I'm concerned, they're well within their rights to circumvent these ridiculous sanctions.  If Iran ends up using Bitcoin, or some other form of cryptocurrency, to achieve that, it would prove beyond doubt that the traditional banking system is becoming weaker and that there is a viable alternative.  If America want to maintain dominance through the dollar, this could easily backfire on them.  America won't be able to use money as a weapon if people don't solely rely on using that particular type of money.  Sanctions would effectively hurt America more than the nations they try to sanction if the result is that other nations adopt crypto instead.