I'm sure this was mentioned in this thread but, people work and have to be paid for the work they do. I don't see that happening in bitcoins anytime soon so i don't think fiat will disappear unless something drastic happens.
What drastic action would be needed? Are we talking nuke wars, are we talking about red light district hoes taking bitcoin as a form of payment. Speak up dude because im trying to understand what you're saying but Im having problems.
Just so you know there are already companies that specialize in bitcoin payroll accounting and overstock even pays their employees in bitcoin if the employee chooses to get paid in Bitcoin.
I cant wait to see your reply.