Bitcoin is traded worldwide as a digital currency and payment system. It is known as the first decentralized form of payment; it works without a central repository (governmental entity) or single administrator. The software that runs Bitcoin was created by an unknown individual, or individuals, under the pseudonym Satoshi Nakamoto. Bitcoin can be traded person-to-person or initiated by a third party, such as an exchange. The most popular and trusted exchange is Coinbase. All trading activities are recorded and verified on a public ledger. A network of computers, that run the Bitcoin software, retains a constantly updating copy of the same ledger; this public register is known as a blockchain.
Click on the Coinbase banner to get bitcoins over the internet. If you are looking to buy bitcoins with cash, check out localbitcoins.com; you can arrange to meet a seller in person!