This is a new generation of decentralized digital currency, created and operating only on the Internet. No one controls it, currency issuance occurs through the work of millions of computers around the world, using a program to calculate mathematical algorithms. This is the essence of bitcoin.
The developer of the program calls himself Satoshi Nakamoto, he proposed an electronic payment system based on mathematical calculations. The idea was to exchange coins without any central authority, electronically, more or less instantly, at the lowest cost.
NOBODY. This currency is not printed by the central bank and does not work according to its rules. Banks can print as much money as possible to cover government debt, thereby devaluing their currency. On the contrary, the issue of bitcoins is possible only in digital form and anyone can start mining or as they say maykit bitcoins at any time. Bitcoinning occurs by means of using computing power of a computer in a distributed network. When transferring bitcoins, the transaction is processed by the same network, thereby turning bitcoin into an independent digital payment system.
National currencies used to be provided usually with gold or silver, now GDP. Theoretically, you could come to any bank in the country, and exchange your paper money for the equivalent of gold and back. Bitcoin is not provided with ANYTHING, this is pure mathematics. Anyone around the world can run a script to extract bitcoins on his computer and feel like a mini-central bank. The source code of the script is published in clear form, everyone can see how it works.