The most important asset that can help with developing a country is productive people, the second most important asset is of course money.
3000 years ago Persians developed persia from a tribal society, to the center of civilization, a place called by Alexander-era historicans the land of "thousand cities". How did they do it?
Well they hired artisans and skilled workers from other places and "paid" them to build subtraenian canals to bring water from lands at the foot of mountains to the desert and to build other infrastructures. Those workers being treated well, stayed in persia and thought persians how to build things.
Incidentally this is how the United States developed. Historically calamity and misery (eg. Irish Famine, Religious hostilities in Europe and other things ) brought skilled workers, farmers scientists and authors from other parts of the world to US.
Can Persians do it again?
Well, it is kind of hard, to bring people to Iran when Iranian skilled workers themselves are fleeing the country in thousands. But may be If the attitudes change we can bring back our own work force after they have been seasoned and become experienced. If they have become rich then it's even better, With changing attitudes we bring the two most important factors of developement into the place that needs developing.
But we can't do that if we keep frightenning people with empty rhetorics.
Ultimately if Iran's economy is kept independent and isolated from the globalized economy, there is a chance that Iran can see the daylight, If and when there is a global calamity.
There is a belief that there exists a massive imbalance in the world economy.
This imbalance concerns the US twin deficit and also the size of speculative economy (investment and financial services) in the world.
Any how The point is we can do it again, but we need to revolutionize the way we do business in Iran.