Bitcoin is crypt currency from a decentralized system for online payments. Bitcoin word derives from the English words bit – information carrier and coin - a coin. And a decentralized virtual currency and the system itself is BitCoin payment web service open source through which to conduct financial transactions peer network. This network is equal, and each can be turned on or off from it at will. And a decentralized virtual currency and the system itself is BitCoin payment system using open source software, through which carried out financial transactions worldwide. Bitcoin is not run as a typical exchange - it has no central bank or central organization. The network is equal, and each can be turned on or off from it at his own discretion.
Bitcoin is protected from inflation because the amount of currency units issued is limited. The price of this crypt currency will increase (deflation), because more people will buy it (for speculation or to use it for purchases of goods and services). And of course because the cost of paper money will fall.
As the system is P2P and every Bitcoin client contains the information for all transactions is extremely difficult system to be manipulated or stopped.