Numismatic (coins and notes) investment

I recently received a 10rupee coin of 60 years of Indian Parliament.



Should I save it or spend it ?? Is it a common coin or not very common ?

BTW, here is a good website

http://cointypes.info/india/ind10r.htm
Yes,
its a commemorative coin, not a common one, but coin collectors delight.
its issued along with a 5 R coin
and
I possess both 5 as well as 10R coin, being a coin collector, since long :)

BTW, start collecting such not very common coins and soon you will have many of different denominations.
 
Read this article :

RBI To Issue New Rs. 500 Notes With Inset Letter 'A'

http://www.ndtv.com/india-news/new-rs-500-notes-to-have-inset-letter-a-5-things-to-know-1711563

Among the other things, it says :
In the existing series of Rs. 500 banknotes, first notified on November 8 when the government in a surprise move announced demonetisation of Rs. 500 and Rs. 1,000 notes, the inset letter "E" can be seen in the two number panels at the upper-left and lower-right corners of the front side.
I checked a 500Rs. note. I can't see the "E" anywhere in the number panel.

Did you guys ever notice it ?
 
ha ha
Then (for general public, who cannot distinguish fake and genuine coins) in a stroke RBI, converted fake Rs 10 coins that were minted locally in a factory, into genuine one.
Re-monetization :D