Privacy Coins 101: What Are They, How Do They Work
https://info.arkm.com/research/privacy-coins-101-what-are-they-how-do-they-work
https://blossom.primal.net/f65281c36132a00756fabed73ba531a4d4044f2...
Zcash has a low number of Nodes. It is very risky.
https://www.weex.com/news/detail/zcash-currently-has-1743-nodes-with-approximately-56-located-in-the-united-states-231557
https://www.weex.com/news/detail/zcash-currently-has-1743-nodes-with-approximately-56-located-in-the-united-states-231557