BITCOIN ADDITIONAL (ticker BTCa) is a decentralized, open-source cryptocurrency blockchain project. It operates on the Proof-of-Stake (PoS) consensus algorithm; everyone who participates in the development of the network is rewarded. The coin was released on 02.02.2022. BITCOIN ADDITIONAL (BTCa) a bitcoin fork A fork is a branching that results in the formation of 2 coins. In this case Bitcoin and BTCa.