$ONION is a privacy coin that uses a hybrid PoW/PoS consensus. Its a mainnet project and can be mined for passive income. At the time of writing this review its price is ~$0.09.
DeepOnion through its DeepVault product gives users the option to secure ownership of their files on the DeepOnion Blockchain, and also give customers a platform to confirm a users ownership of the files.
Its main feature putting it among privacy coins is its DeepSend, where users can make private payments without evidence between sender and receiver.
Anonymous transactions are possible due to the Tor network integrated into the DeepOnion wallet, which will send your payment without leaving traces.
It was launched in 2017, its good to see the project still going strong. Privacy of transactions is important and would always be relevant. $ONION claims to have protected users privacy since 2017 without a single leak.