Unless it is at protocol level, it's not private. Like with DASH and ZCASH, their privacy features are not default features and are an elected feature. It's cool and all, but still allow for lurkers. And in ZCash's position. Many say the ZK Snarks feature is actually a backdoor.
Litecoin tried with Mimblewimble, but doesn't really do anything because the primary layer is still as transparent as Bitcoin.
I have been looking at DERO as well as a privacy smart contract chain, but there is allot of work that still needs to be done there.
Secret Network is cool, but transparent at base layer. You have to 'wrap' your assets to make them private.
Monero is still privacy king. Hive needs an encrypted privacy layer for transactions, not just memos, that would be cool.
Dero is an Aussie abbreviation of Derelict and is a pretty damning insult. Easy to remember :)