The total supply of Bitcoin is capped at 21 million, making it a deflationary asset.
This scarcity is built into its code, which prevents the creation of new bitcoins beyond this limit.
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As of January 2025, approximately 19.6 million bitcoins have already been mined, leaving about 1.4 million bitcoins yet to be mined.
This figure changes due to ongoing mining activity.
Bitcoin mining rewards are halved approximately every four years in an event known as "halving." The most recent halving occurred in May 2020, reducing the block reward from 12.5 to 6.25 bitcoins per block.
The next halving is projected for around April 2024, which will lower the reward to 3.125 bitcoins per block, further decreasing the rate at which new bitcoins are created.
The decreasing quantity of bitcoins available to mine leads to increased scarcity, which can influence its market value.
This dynamic is an essential principle of supply and demand in economics.
About 900 bitcoins are mined daily under current conditions.
However, this number will decrease after each halving, meaning fewer new bitcoins enter circulation over time.
The last bitcoin is estimated to be mined around the year 2140.
This long timeline is due to the halving process, which slows down the production of new bitcoins as the total approaches the 21 million cap.
The maximum supply cap of Bitcoin contrasts sharply with traditional fiat currencies, which can be printed in unlimited quantities, leading to inflation and devaluation over time.
It's estimated that approximately 3-4 million bitcoins are lost permanently due to forgotten private keys, lost wallets, and other technical mishaps, significantly affecting the circulating supply.
Bitcoin utilizes a proof-of-work mechanism where miners solve complex mathematical problems to validate transactions.
This process requires substantial computational power and energy consumption.
Mining pools have become popular among miners to aggregate computational power, thus increasing the chance to earn rewards.
These pools split the block reward among participants based on their contributed hash power.
The technology behind Bitcoin, called blockchain, ensures transparency and security.
Each transaction is recorded on an immutable ledger, making Bitcoin resistant to fraud.
Bitcoin's early years saw minimal competition, but now thousands of alternative cryptocurrencies exist, collectively referred to as "altcoins," which have their unique structures and supply mechanisms.
The concept of Bitcoin and its mining was first introduced by a person or group using the pseudonym Satoshi Nakamoto in 2008, with the first block, or "genesis block," being mined in January 2009.
Bitcoin mining is decentralized, meaning no single entity controls the entire network.
Miners around the world contribute to the network's security and transaction verification.
The shift towards more energy-efficient mining methods is ongoing, with some miners using renewable energy sources to mitigate environmental concerns regarding Bitcoin’s energy consumption.
Some estimates suggest that by the time Bitcoin reaches its supply limit around 2140, more than 90% of the total supply will have already been mined, creating a significant focus on transaction fees as a revenue source for miners.
Transaction fees become increasingly vital for miners as block rewards diminish due to halvings, potentially making up a larger portion of their income as time goes on.
Bitcoin’s protocol allows for the creation of "layer two" solutions, like the Lightning Network, which enhances transaction speed and reduces fees, offering scalability to the Bitcoin network.
The governance of Bitcoin is predominantly managed by the community of miners and developers who propose improvements to the software, which requires consensus to implement changes, highlighting its decentralized nature.