BlackCoin is the first cryptocurrency that uses proof of stake for validating transactions as opposed to proof of work, otherwise known as mining. Blackcoin¡¯s lead developer, RAT4, has been a major innovator in proof of stake technology. PoS 3.0 is the newest version and has been shown to make Blackcoin secure, energy efficient, and most importantly, decentralized. The Blackcoin PoS technology has been used by hundreds of coins including Stratis, Qtum, and Radium. By pushing the boundaries of the winning Bitcoin technology, RAT4 has solved almost every problem that Bitcoin has encountered. No mining means Blackcoin is energy efficient. Transaction fees are rewarded to the people who hold Blackcoin and stake their coins in the Blackcoin wallet. In addition, Blackcoin has faster transactions making this the perfect coin to be used as a currency. Blackcoin will continue to innovate as shown by the newest update that makes it compatible with NodeJS, one of only two coins to have this functionality. Blackcoin will continue to innovate and push the boundaries in the cryptocurrency space as it continues to gain mass adoption.