Notaphily is the study of paper money or banknotes. A notaphilist is a collector of
banknotes, paper money, paper currency or plastic notes.
I have always wondered how this world would function without currency. It's quite
unimaginable to follow barter system in the 21st century.
For several centuries, coins were used to pay for the variety of items, they were an
important part of the exchange process. It is believed that paper currency was first
developed in the 7th century in China.
Notaphily is not as popular as Philately & coin collection but in recent times many people
have been showing interest in collecting currency notes.