Scripophily is about collecting and researching antique securities, such as share certificates and government bonds. This is a 1926 share certificate in The Gold Mohur Mills Limited from Mumbai. Note the obverse and reverse of a Gold Mohur coin in the underprint.

Franky Leeuwerck, a member of the International Bond and Share Society, has a survey running on his blog relating to collector preferences. His survey questions are relevant to all numismatic collections. Beauty, scarcity, historical significance, a good bargain and collection completeness, are incentives for collectors worldwide. You can participate anonymously. Access the survey here:
http://leeuwerck.blogspot.com/p/blog-page.html