Well-known examples of fiat currencies include examples of fiat currencies include the US Dollar (USD), Euro (EUR), Japanese Yen (JPY), British Pound (GBP), and many others.
Lol, each and every one of us is from one country of the world, we very well know what fiat currencies are, and examples of them. 
Bitcoin offer more security and privacy than traditional currency transactions.
It offers more privacy if you use it in a private way and avoid centralized exchages and sevices that are custodial.While the price of Bitcoin can fluctuate dramatically, fiat currency is much more stable.
Fiat is also affected by inflation/hyperinflation, the value of your fiat currency constantly loses its value as inflation levels grow.A Fiat Currency can be reversed in-case of wrong happenings whereas, Bitcoin transaction cannot be reversed if any happenstance occur.
Bitcoin transactions cannot be reversed if it has been confirmed (with at least 1-6 confirmations), but when the transaction is unconfirmed, it can be double-spent.