Bitcoin 2 is a Proof-of-Stake Bitcoin fork focused on anonymity and base-layer scalability.
Bitcoin 2 introduces masternodes to Bitcoin and switches to a Proof-of-Stake model in an attempt to improve on Bitcoin’s scalability and on-chain transaction privacy. According to the project’s website, Bitcoin 2 was born because Bitcoin “can sometimes be more expensive than wire transfers” and “the transactions are also trackable.”