Bitcoin 2 (BTC2) is a digital currency that aims to provide a scalable, energy-efficient solution to the world of cryptocurrency. It is a snapshot fork of Bitcoin, meaning it was created by taking a snapshot of the Bitcoin blockchain and then developing a new blockchain from that point. BTC2 supports private transactions through the Zerocoin protocol and nearly instantly verified payments through Masternodes. The size of the Bitcoin blockchain was pruned from around 150 GB to less than 1.5 GB for Bitcoin 2, which aims to allow new nodes to get started much faster. At its launch, all Bitcoin holders as of a certain date received BTC2 on a 1 for 1 basis.

Bitcoin 2 operates using a unique Proof of Stake algorithm, which aims to reduce electricity use compared to other cryptocurrencies. It utilizes an energy-efficient custom Proof of Stake protocol and a second-tier Masternode network to handle transactions that confirm in a second. The Bitcoin 2 balances, addresses, and supply were set to equal those of Bitcoin. The blockchain was pruned to allow for faster node setup. The currency also supports private transactions through the Zerocoin protocol, which provides a protocol-level coin mixing service using zero-knowledge proofs to sever the link between the sender and the receiver with 100% anonymity and untraceability.

Bitcoin 2 aims to be an advanced digital currency that is fast, decentralized, and private. It can be used for nearly instant, private transactions, making it a potential choice for individuals and businesses that value privacy and speed in their transactions. It also aims to be energy efficient, which could make it an attractive option for environmentally conscious users. Bitcoin 2 also aims to be scalable, with a higher transactions per second rate compared to some other cryptocurrencies, which could make it suitable for large-scale, high-speed transactions.

Bitcoin 2 was created as a result of a decade of improvements to blockchain technology. It was launched as a snapshot fork of Bitcoin, with all Bitcoin holders as of a certain date receiving BTC2 on a 1 for 1 basis. The Bitcoin 2 balances, addresses, and supply were set to equal those of Bitcoin. The size of the Bitcoin blockchain was pruned from around 150 GB to less than 1.5 GB for Bitcoin 2. This was done to allow new nodes to get started much faster. The supply of Bitcoin 2 was set at a certain amount at the time of its main net launch.