Primecoin has never had significant popularity. It pumps, crashes, pumps, crashes. So far, in its entire history, less than 74k wallets have been created, https://chainz.cryptoid.info/xpm/#!rich most of them by exchanges probably so there could be 1,000 to 5,000 actual people who have ever been interested in primecoin.

Two paths

1) Continue pump and dump cycle

2) Create a human mining wallet that lets people mine by doing human work rather than pretending computer "work" is work.