Bitcoin (codenamed: BTC, XBT, BitcoinSign.svg) is a codeword, invented by Satoshi Nakamoto in open source software since 2009. Bitcoin can be exchanged directly with a connected device. Internet without the need of a financial intermediary.
Bitcoin offers great advantages over other currencies: Bitcoin can not be tampered with, highly secure and very safe, extremely low transaction costs, environmental protection, potential e-commerce development.