What is bitcoin?
Bitcoin is the currency in electronic form. So there is no physical form at all. No bitcoin coin is like a conventional currency. Bitcoin, like other digital currencies, is stored on the internet.
Bitcoin is not regulated until now either by the government or the banks. And its users can make transactions anonymously.
Is the bitcoin unique?
Bitcoin is not really something unique. According to CoinMarketCap data, there are about 1,324 digital currencies that exist today with a total market capitalization of USD 341 billion, almost equal to the value of Johnson & Johnson companies. But indeed bitcoin is the first and largest digital currency.