BITCOIN ADDITIONAL - is a Bitcoin Fork and decentralized, open-source cryptocurrency blockchain project. It operates on the Proof-of-Stake (PoS) consensus algorithm. By switching from the Proof-of-Work (PoW) algorithm, on which Bitcoin runs, to the Proof-of-Stake PoS) algorithm, our coin solves issues within bitcoin's including: low transaction speeds, reliance on mining equipment, high energy consumption, and costly fees. Everyone who participates in the development of the network is rewarded. The BTCa coin allows for environmentally friendly bitcoin mining, stacking, and holding masternodes.