he thinks bitcoin has more potential to do positive than negative things for Iran and its government.
Bitcoin has the potential to literally circumvent sanctions on Iran, maybe it's not possible denominate oil or other big trade sectors in
BTC at the moment. But I'm sure Bitcoin would facilitate smuggling, it would also help satisfy Iran's desperate need for hard currency (they are doing anything to get their hands on gold.).
But more importantly it would end the financial embargo on Iran. One could sell services and technological know-how to Iran through tor/onion with payment in Bitcoin and it would be impossible to sanction it. You might be able to stop a specially engineered oil technology part from entering Iran, but you wouldn't be able to stop the blueprints of how to make it nor the Bitcoin payments for those.
Finally, for the domestic economy in Iran Bitcoin will be a godsend, ending the double-digit inflation that has plagued the country for so long.
PS. If the Iranians actually started trading even a small amount of oil in Bitcoins that means Bitcoins will be oil-backed and they will become undefeatable Petrocoins.