Fiat currency will not be completely removed.
Blockchain technology is the future. As the blockchain provides more options in the future, it will witness the faster development of new integration with existing technologies and the introduction of newer technologies. People are more and more aware of the potential of encryption technology. People can participate in a completely transparent and permissionless financial system without any central agency or government, allowing users to participate in a more effective and fairer reward distribution system.
A fairer and more inclusive decentralized economic model is gaining appeal in the whole society. Encryption will democratize the creation and transmission of value, and it is gradually integrating and changing everyone's life. Cryptocurrency is vital to the future of the global financial system.