Bitcoin is a digital and global money system (currency). It was created in 2009 by a person or group of people under the alias Satoshi Nakamoto.
Bitcoins are created over time by users of the Bitcoin network, instead of by a central bank or government. This means that Bitcoins are "trustless" in that users aren't required to trust any higher authority, or even each other, in order for their money to be secure. This is why Bitcoins are called a "crypto-currency", because the system is backed up by math (cryptography) rather than a central authority. This decentralization also means that various properties of bitcoins, like their value, number of bitcoins in circulation, inflation rate, and transaction fees cannot be manipulated by any single person or group. Bitcoins allow people to send money to other people anywhere in the world in very little time and with little or no fees.
Extensions to the bitcoin design allows for anonymous payments online.
Bitcoin adoption and use continues to grow sharply each year. Since 2012, Bitcoin has gained the attention of the mainstream media.[source?] Adoption growth has not only occurred for consumers, but also for many companies looking to utilize all of the advantages presented by Bitcoin.