Bitcoin is a decentralized digital currency, without a central bank or single administrator, that can be sent from user to user on the peer-to-peer bitcoin network without the need for intermediaries. Transactions are verified by network nodes through cryptography and recorded in a public distributed ledger called a blockchain.
Bitcoin is unique in that there are a finite number of them: 21 million.
Bitcoins are created as a reward for a process known as mining. They can be exchanged for other currencies, products, and services.
As of February 2015, over 100,000 merchants and vendors accepted bitcoin as payment.
Google Finance is a product of Google that allows users to track the stock market, find news related to the stocks they’re interested in, and get real-time stock quotes. It also allows users to create and track their own portfolios of stocks and mutual funds.
There is no mention of Bitcoin on Google Finance as of February 2015.