Bitcoin - Basic info you must know

Bitcoin is a cryptocurrency and worldwide payment system. It is the first decentralized digital currency, as the system works without a central bank or single administrator. Wikipedia
Coins: Unspent outputs of transactions (in multiples of a satoshi)
Ledger start: 3 January 2009 (9 years ago)
Supply limit: ₿21,000,000
​1⁄1000: millibitcoin
​1⁄100000000: satoshi
Founder: Satoshi Nakamoto