I think bitcoin and Fiat are not antagonistic. From bitcoin development, maybe bitcoin has a protective effect on Fiat. We all know that Fiat often inflation, and bitcoin can control this very well. The continuous development of the encrypted community will promote the Fiat system to be healthier.
Bitcoin is no doubt one of the best thing and that there are so many people whose lives have been significantly changed because of bitcoin and that there are continuously investing their money into these crypto coins and are changing their lives. After this evolution of the crypto currencies, there will be no such need of the paper money and that people will avoid using it in near future.