Bitcoin is a decentralized digital currency that enables very fast and inexpensive payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Bitcoin is also the name of the open source software which enables the use of this currency.
c-gold is a digital gold currency backed by gold stored in vaults. c-gold balances fluctuate according to fluctuation of the price of gold.