HyperCash or HCash is an interoperating blockchain that facilitates activities regarding transferring cryptocurrencies and data across different ledgers. While the other cross-chain projects focusing on optimizing the interoperability, HCash implements a mechanism of zero-hash proofs to enhance the privacy of transactions making it one of the most interesting blockchains to watch. On top of that, the project utilizes DAG consensus, Proof of Stake, and Proof of Work at the same time to govern the network. HyperCash is really an ambitious project with some strengths as well as some weaknesses.