1 Bitcoin is secured by blockchain technology, thereby making it difficult to counterfeit or toy with.
Counterfeiting fiat money isn't exactly easy. Most people encounter counterfeit banknotes only a few times in their lives and in small numbers.
2 Bitcoin hardly has a physical structure to speak its value unlike that inherent for fiat money. It operates on a decentralized infrastructure that makes direct money transfers quick, traceable, transparent, and immutable.
Bitcoin transfers are not quick, many banks and payment networks these days offer nearly instant transactions. Bitcoin tx takes 10 minutes on average, if you pay enough fees to get in next block. And it can take hours or days if your fee is too low.
Transparency and traceability is bad, it means other people can see where you are sending money.
Immutability has pros and cons. If you lose your money, no one will recover them for you. Zero chance.
3 The number of parties involved is technically only two for bitcoin, unlike fiat where third parties must be present.
Again, third parties can cause harm, but also can cause good. They can fix your mistakes and save your money from certain bad situations.
4 As the current world change has been from the traditional mode of exchange to electronic mode(digital mode). Bitcoin has an upper hand, as it is purely digital.
In terms of digitalization, Bitcoin has no upper hand over fiat, which is also digital. People these days are paying with fiat via cards, phones and apps.
5 Bitcoin has in recent times proven to be a strong alternative to fiat money, thereby making it a unitarian global currency.
Actually its the opposite, the image of Bitcoin as a hedge against inflation and economic uncertainty was shattered.