Bitcoin is created in 2009. It's native to the internet, and globally circulated, and not issued by any agencies, banks and governments.
The expected issued volume is 21 million BTC. The smallest unit of each BTC is 10E-8.
Bitcoin is transmitted point-to-point. All transactions are encrypted, and recorded on the public ledger. The security of all transactions are enhanced via distributed transaction recording powered by computer hashing power.