Gemini is a Bitcoin and Ether (the native currency on the Ethereum blockchain) exchange platform. It was founded by the Winklevoss twins back in 2015. The name itself – Gemini – is a reference to the constellation and zodiac sign depicting a pair of twins.The Gemini exchange only supports Bitcoin and Ethereum. This is likely because Gemini seeks to be a highly trusted and institutional-friendly exchange.Gemini is also ideal for users who want to make lots of trades daily. Professional traders will certainly enjoy the enhanced security features protecting both their fiat and digital currency accounts.