This is the biggest attendance at a sporting event held in an enclosed stadium. The crowd number is an unofficial number - the official crowd (people who paid tickets) that day was 173,850. Due to its large capacity, Maracana stadium has many more reported sporting events with large attendance figures.
Bitcoin is a digital currency (also called crypto-currency) that is not backed by any country's central bank or government. Bitcoins can be traded for goods or services with vendors who accept Bitcoins as payment.
Since Bitcoin is a new technology, what it is and how it works may be initially unclear. Bitcoin is sometimes presented as being one of three things: Some sort of online 'get-rich-quick' scam. A loophole in the market economy, the installation of which guarantees a steady influx of cash.