Bitcoin also has a stipulation - set out in its source code - that it must have a limited and finite supply. For this reason, only 21 million bitcoins will be produced. On average, these bitcoins are fed into the bitcoin supply at a fixed rate of one block every ten minutes. You probably already know that the US government regulates the circulating supply of U.
In the case of cryptocurrencies such as Bitcoin, there is no centralised authority such as a government that regulates supply. Instead, the circulating supply is entirely determined by the users of the network. The creator of the Bitcoin network - Satoshi Nakamoto - created 21 million Bitcoins that are held in a pool. To receive Bitcoins from this pool, miners have to solve complex equations to verify transactions.
Once they successfully verify a transaction, they receive a Bitcoin reward from the pool. Bitcoins currently exist. This number changes approximately every 10 minutes as new blocks are mined. Right now, each new block adds 6.Bitcoin is a consensus network that enables a new payment system and fully digital money.
It is the first decentralised peer-to-peer payment network that is driven by its users without central authority or intermediaries. From the user's point of view, Bitcoin is practically like the cash of the Internet. Bitcoin can also be regarded as the most prominent triple-entry accounting system in existence. Since bitcoins can only be created by mining, all bitcoins in existence are bitcoins that have been mined.
This creates new bitcoins more quickly, so on most days more than 900 new bitcoins are created. No more bitcoins can be created, and existing bitcoins cannot be destroyed, they can only be lost. Since the number of bitcoins created each time a user discovers a new block - the block reward - is halved based on a fixed interval of blocks, and the time it takes on average to discover a block can vary depending on the mining power and difficulty of the network, the exact time at which the block reward is halved can also vary. Although the number of bitcoins in existence will never exceed just under 21 million, the money supply of bitcoins can exceed 21 million due to fractional reserve banking.
When the mining process started, a large number of bitcoins were released, and over time, fewer and fewer bitcoins are released. Bitcoins can be lost if their owner loses the private key of a paper or other cold-storage wallet, or if bitcoins are stored on a hard disk or wallet that is lost. The private key is needed to send bitcoins from one wallet to another, so without it, bitcoins cannot be used or sold. Between lost, stolen and retained bitcoins, there are only about 8 million bitcoins left circulating in the current market.
Consequently, the timing of when the last bitcoin will be created will also vary, and is subject to speculation based on assumptions. What was done was that a certain amount of Bitcoin was scheduled to be created with each block, starting with 50BTC per block. After 64 halves no more Bitcoin can be produced and in 2140 around 21 million Bitcoin will have been created. Assuming that all pools have similar numbers, it is likely that there are more than 1,000,000 unique individuals mining bitcoins.