Well the patent is over and there are now generics. Plus if you get proscar split into 8ths you can make it last half a year on 10 dollars... I would take the time to peruse Mercks financial statements and see if they show how profitable propecia still is but it isn't worth bother to me. But since you seem to have the facts handy perhaps you can post it.
My thoughts are this: the only cure would be to alter your DNA. Which is just about impossible and so I don't see how there can be a cure. The best imaginable option I can think of is to stop the hormone that causes it which we essentially already have. Propecia is the cure. Unfortunately once the hair follicle is gone the only way to grow that hair back is replace it. Unless you can some how magically revitalize a dead hair follicle. I would imagine that being as difficult as reawakening the dead, or finding a cure for cancer.
To me we already have the best cure we are looking for. It's finasteride.
And I will reiterate that the true best cure would be for society to be more accepting of bald people. Granted I see some bald guys and think it looks fine, don't think twice, and never would make fun. But then there are some that don't hold themselves highly and can tell they are bothered by their hair loss. These are the men I want to help change their self image. Including myself. I personally have accepted some day I will be bald. I just want to try and prolong it longer. Not because I think there is a cure coming. Although I still want to hear more about follicept....