Bitcoins are mined by directing intense amounts of computing power at solving math problems. The faster and more efficiently you can solve math problems, the more bitcoins you get.

 

 

Bitcoin is structured so that it gets harder and harder to mine bitcoins over time, so there's a huge arms race to build the most hardcore computers dedicated to mining the coins.

 

 

KNC says it sold $1 million every hour for the first five hours the new unit, called the Neptune, went on sale, said the company spokesman.