ZCash is insecure by default. It is a honeypot for people who wish to use the default privacy settings of Monero.
> On June 8, 2020, Chainalysis added support for Zcash to their Chainalysis Reactor and "Know Your Transaction" (KYT) technologies.[22] This permits Chainalysis to trace and provide transaction values and at least the sender or receiver address for over 99% of Zcash activity.[22] Chainalysis explains that it is able to accomplish this since most Zcash users do not use privacy-enhancing features.
There have been some claims that Chainalysis has been able to make progress in de-anonymizing Monero. It’s hard to know what’s true. We’ve certainly seen where false information is used to steer people in certain directions. E.g. “Monero isn’t anonymous, so don’t use it.” When it reality it is anonymous, which is the real reason they don’t want you to use it.
Bitcoin was never anonymous. It just took an incredible amount of effort to follow the transactions, along with subpoenas to exchanges, that even the shady exchanges gave into. Chainalysis are credited with bringing down the biggest criminals that tried to hide behind Bitcoin. Who knows if they have also cracked Monero, because there was a short while where people thought Bitcoin was safe before it was known that Chainalysis was already at their door.
> On June 8, 2020, Chainalysis added support for Zcash to their Chainalysis Reactor and "Know Your Transaction" (KYT) technologies.[22] This permits Chainalysis to trace and provide transaction values and at least the sender or receiver address for over 99% of Zcash activity.[22] Chainalysis explains that it is able to accomplish this since most Zcash users do not use privacy-enhancing features.
- https://en.wikipedia.org/wiki/Zcash