It’s true that India’s independence cannot be attributed to one single person. Though Gandhi has played a role, there are many other great persons who dedicated their entire lives for India’s independence and development including Swantantraveer Savarkar, Veer Bhagat Singh, Sardar Patel, G.K.Gokhale guruji (Guru of Gandhi),Veer Subhashchandra Bose, etc.

Gandhi’s image on currency notes is probably an attempt to brainwash Indians that Indian National Congress party is the best.
India is known for it’s diversity. That must be represented on Indian currency notes.
Not all the leaders featured on other countries’ currency notes are known by us Indians. Likewise, just because other great leaders do not have international importance, their images cannot be eliminated as an option.

Time-line (History of Currency printing trends) :-
Currency printing has started in India from 18th Century, i.e in 1700s by Kings who ruled different parts of India.
From 1861, British government took the authority to print Indian currency and prohibited others to do so. From then they printed notes with British leaders images on them.
After Republic day in 1950, India started to print it’s own currency with Ashoka’s Emblem on them. Because it was adopted as National emblem of India.
On the backside of notes, our biological diversity and the advancements in the country were depicted by different images on different notes.
From 1996, M.K. Gandhi’s image was being printed on all currency notes of India.

Conclusion :-
Completely replacing Gandhi’s picture on currency notes will reduce his importance, which is not at all a positive thing. But to represent India’s diversity and to give due importance to other great leaders, it would be good if more leaders are represented on Indian currency notes. If it’s difficult to pick a few, we can represent more leaders by representing more than one leader for one denomination. For example Gandhi’s 10 rs. series, Subash Chandra Bose’s 2000 Rs. series, Veer Sawarkarji’s 2000 Rs. series, Bhagat Singh's 2000Rs. or with modern leaders like APJ Kalamji, etc.

Afterwords:- Do you think it’s time to give honor to other great freedom fighters? Express your thoughts in the comment section below.