The base currency is XLM. The counter currency is bitcoin. Released in 2009 bitcoin is the first cryptocurrency ever introduced and is considered the ‘big brother’ of all existing crypto coins. The creation of Bitcoin enabled the advent of blockchain technology advances. In the XLM/BTC rate bitcoin is quoted against XLM or lumens. XLM is the native currency unit of the Stellar network. The network was launched in 2014 with 100 billion XLM in total. The XLM/BTC chart is available at Capital.com.