Sherpa Blog: Mining for Bitcoin
There are essentially two methods of obtaining Bitcoin, the digital currency. The first is to buy it from an exchange, where the going rate
is $875 per coin (one year ago it was at $17). The other approach is to "mine" the currency. Bitcoins have a limited supply; in order to
increase the supply computers must mine them by solving a series of complex calculations that add and certify the transactions of other
Bitcoin holders. If a particular miner solves the problem before others, the miner earns 25 Bitcoins ($21,875 at today's prices).