Secondary CryptoAsset refers to metadata or (programmatical) value of Primary CryptoAsset that may embed, link or contain as such, but not limited to:
1. Codes/Scripts (P5.JS, JSON, etc),
2. Files (JPEG, GIF, PNG, MP3, MP4, Doc, etc)
3. URIs
Example, but not limited to:
Token BAYC#2555 Primary Asset has Secondary Crypto Asset (URI type) pointing to JPEG of BAYC#2555 to an off-chain server.
