9 coins" indicates the nine types of devotion
1) Shravana (Listening)
2) Kirtana (Devotion Music)
3) Smarana (Remembering )
4) Pada-Seva (Resorting to the Feet)
5) Archanan (Worship)
6) Namaskara (Paying Obeisance)
7) Dastya (Service)
8 ) Sahnyatva (Friendliness)
9) Atma Nivedanam (Surrender of the Self)