It is said that bitcoin will destroy the fiat system but i believe that if this happens the world will change completly because banks and a lot of things will go out of market.
Our life will depend on technology. Banks will disappear in the market because it is not needed by everybody. There's an alternative way to keep our money or to save our money. Banks are against in bitcoin even our government. They couldn't control the bitcoin. Maybe someday it will happen but I wish not to happen because it is very alarming. We know that fiat and bitcoin are very important to us to make a transaction.