Link: http://www.geopoliticalmonitor.com/tehran-pushes-to-ditch-the-us-dollar-4591/

There is another downside, a potential threat now lurking in the shadows. The value of the US dollar is determined in large part by the fact that oil is sold in US dollars. If that trade shifts to a different currency, countries around the world won't need all their US money. The resulting sell-off of US dollars would weaken the currency dramatically.Everybody says the US goes to war to protect its oil supplies, but doesn't it really go to war to ensure the continuation of the petrodollar system? Iran may be isolated from the United States and Western Europe, but Tehran still has some pretty staunch allies. Iran and Venezuela are advancing $4 billion worth of joint projects, including a bank. India has pledged to continue buying Iranian oil because Tehran has been a great business partner for New Delhi, which struggles to make its payments. Greece opposed the EU sanctions because Iran was one of very few suppliers that had been letting the bankrupt Greeks buy oil on credit. South Korea and Japan are pleading for exemptions from the coming embargoes because they rely on Iranian oil. Economic ties between Russia and Iran are getting stronger every year.Iran's energy resources are a matter of national security for China.