Here is an article on advantages of bitcoin, but it’s more about its appeal for small businesses and alike
https://cointelegraph.com/news/top-10-benefits-bitcoin-provides-new-users

As for the general public, the advantages are:

Anonymity. Much like cash-only purchases Bitcoin transactions are never associated with a person but with the anonymous Bitcoin address.

No Third-part interruptions. The system is 100% peer-to-peer, which gives a greater degree of freedom.

No taxation

Low Transaction Fees. Since there are no intermediary institutions, there are no fees and exchange costs. It’s a great advantage for travelers.

The speed of Transaction. No inconvenience of standard authorization procedures and wait periods.

Mobile Payments. We can do online payments with fiat money too, but unlike traditional online payments with bank accounts or credit cards, again no personal information is necessary to complete a transaction.

Here is a Ted talk that explains pretty well the ABC of bitcoin

https://www.youtube.com/watch?v=Vzjtvt77mgc

Agree! Even though Christine Lagarde proclaims that the blockchain technology and cryptocurrency can replace national monies, conventional financial intermediation, and even will ‘puts a question mark on the fractional banking model we know today’, it is still a question whether bitcoin or any other cryptocurrency will totally replace the fiat money.
Eventually, bitcoin will influence all conventional transactions for sure but people will still use dollars, euros, rubbles, etc

Right now people - mostly general public who have just heard the word but didn’t really go into all the details - hear only about the speculative side of bitcoin. That its rate is soaring, that there is a lot market speculation, etc. In a few years, or can it be months when people learn about all the convenience of using bitcoin for all their personal transactions, they will welcome it for sure.