Steve Forbes explains why a key lesson in the collapse of Iran's currency, which could end the nightmarish regime of the Ayatollahs, highlights the importance of any nation maintaining strong legal tender—and should remind President Trump of the value of a robust U.S. dollar. Read the full story on Forbes: Subscribe to FORBES: https://www.youtube.com/user/Forbes?sub_confirmation=1 Fuel your success with Forbes. Gain unlimited access to premium journalism, including breaking news, groundbreaking