Sorry, but barter is inherently inefficient which is why it hasn't been practiced since the dawn of recorded time (except in the rare instances of initial contacts with indiginous populations).
Barter requires you to trade something you have for something that someone else has that you want. Currency allows you to trade something you have and to purchase something you want from a third party.
So you are saying the Iran is single-handedly going to overturn 5000 years of traditional trading practice?
Not likely.
YES! ASOLUTELY. Why is this so hard to understand? We are faced with an incredible (I admit, hard to believe and for you apparently hard to fathom) but horrific scenario if we allow the neo-Iran of Ahmadi-Nejad to remain and play out their hand.
You dabble with details in your answers that have nothing to do with what we NOW face. You discuss the past and YOUR present. None of this is VALID anymore. What has been done or has happened in the past 50,000 not just 5,000 years is or will soon be for nought and meaningless.
You are arguing/defending a "present" that no longer exists - or will no longer exist if Ahmadi-Nejad, Ayatollah Mesbah Yazdi and their chosen loyals play out their strategy.
If you have not read the "Mullah Threat not sinking in" on http://www.antimullah.com then please go there and do so and take it as a warning not another reason to nitpick using YOUR parameters instead of those that will appear.
We ARE facing a horrendous situation about which we can do very little. Unless we rain destruction on the neo-Iran's military and nuclear sites. Fast becoming a survival choice of "them or us".
All the best.