I believe in Fiat because it will always be protected by the government. Fiat is a way of controlling people, so it will never disappear
Then what if the government starts to shift? what if government uses bitcoin to control people?To be honest, I am still using fiat as there is no other way in where I live to survive using bitcoin alone. If there is a way to eat and pay my taxes with bitcoin, I could try living 50/50 between bitcoin and fiat.
Without fiat, my everyday walk of life will be paralyzed.
I guess it's impossible to happen, the government will not shift to be bitcoin because they have fiat which they created and who would they control people when bitcoin is decentralized. They do not know who owns most of bitocin and even if they know that is unlikely to happen.
Government will protect what they created and this world will always be centralized under their control and governance.