There's another DAG chain cryptocurrency coming soon: Yobicash.
Yobicash is a cryptocurrency based on DAG chain so doesn't have the scalability issues associated with blockchains.
Yobicash is a cryptocurrency built to secure the storage and sharing of data by ensuring the main properties of information security: confidentiality, integrity and availability. To enforce these properties, Yobicash employs cryptographic protocols, data replication, economic incentives and a DAG chain of transactions.
The cryptographic primitives and design are described by project designer Christian Nyumbayire in the Yobicash whitepaper first published in October 2017: https://yobicash.org/whitepaper.pdf
In summary, Yobicash reinforces:
privacy through zero-knowledge proof and encryption
data integrity through cryptographic authentication
data availability through replication
To find out more, join the Yobicash chat: https://t.me/joinchat/AdtOLUQpI9uUG5bH326S2w