Here are the reasons why i think it is worth to collect.
I. He is not a commercial monk. Very holy n focus on helping villagers n building schools.
Ii. All amulets very limited in quantity. Limited batches made with unique materials.
Iii. Many followers that focus on only lp moon. Die hard fans.
Iv. It is well loved by Thai business man. Proven effectiveness especially in wealth fetching.
V. Good design n easily accepted by collectors n users alike.