Re: [ANN][ZEN] ZenCash: Private, Secure, Resilient CryptoCurrency with zk-SNARKs

3.5 percent security node award, I want to participate in it, how many ZenCash do each security node need to hold?

Announced Fork will implement block reward changes 10% 10% 10% 70% as you can see on a picture.
increasement from 3.5% of every block to 10% will follow immediately after the fork.

https://blog.zencash.com/mandatory-upgrade-zen-2-0-14-super-nodes/

ZenCash Secure Nodes tracker - https://securenodes.na.zensystem.io/
ZenCash Secure Nodes calculator - http://securenodes.lebre.net/
Combo calculator - https://docs.google.com/spreadsheets/d/1p7qduhX2rFNFvik1YqD326qP55U4-UEce5ieeE5INAc/edit#gid=1738345991

More here-> https://zencash.com/assets/files/Zen-Application-Platform-Whitepaper.pdf