The Bitcoin network has reached a significant milestone: over 20 million of the maximum 21 million possible coins have already been mined. This development highlights the progressive scarcity of the cryptocurrency and raises important questions about the future of the network. The timing of this milestone is particularly noteworthy, as it was reached just a few months after the fourth Bitcoin halving in April 2024.
Artificial scarcity as a value driver
The limit of 21 million Bitcoin fundamentally distinguishes the cryptocurrency from traditional currencies. While central banks can print money at will, Bitcoin is mathematically limited. This programmed scarcity is considered one of the main reasons for the digital currency’s performance. Currently, about 450 new Bitcoin are mined every day – a number that is halved every four years by the so-called halving.
This deflationary characteristic makes Bitcoin a unique asset in the financial world. Unlike fiat currencies, which lose purchasing power due to inflation, Bitcoin theoretically becomes more valuable the more people use it due to its limited supply. This mechanism was described by Satoshi Nakamoto in the Bitcoin white paper back in 2008 and has proven to be one of the strongest price drivers.
Halving mechanism amplifies scarcity effect
The halving process systematically reduces the number of new Bitcoins in circulation. After the last halving in April 2024, daily production fell from 900 to 450 Bitcoins. This mechanism ensures that the inflation of the Bitcoin supply continuously decreases and the point of complete exhaustion of the supply approaches.
Experts estimate that the last Bitcoin will not be mined until around 2140. Historically, halving events have led to significant price increases. After the first halving in 2012, the price of Bitcoin rose from around $12 to over $1,000.
The second halving in 2016 kicked off the bull run that catapulted Bitcoin to nearly $20,000 in 2017. The third halving in 2020 was the prelude to the historic rise to over $69,000 in 2021. These patterns reinforce the expectations of many investors for the coming years.
Security budget problem threatens network stability
However, the declining block reward creates a structural problem: miners are increasingly dependent on transaction fees. While block rewards still account for the majority of miners’ income today, from 2140 onwards, fees alone will have to finance network security. Critics fear that low fees could jeopardize the hash rate and thus the security of the network.
The hash rate, a measure of computing power in the Bitcoin network, is currently at an all-time high of over 600 exahash per second. This enormous computing power makes the network virtually unassailable. However, if miner revenues decline dramatically, some of the mining capacity could be shut down, which would compromise the security of the network. Experts are discussing various scenarios for how the balance between security and costs could develop.
Impact on market dynamics and pricing
The ongoing scarcity is already influencing market behavior. Institutional investors such as MicroStrategy and Tesla have added Bitcoin to their balance sheets as a store of value. The fact that only one million Bitcoin are still available is intensifying competition for the remaining coins. At the same time, reduced daily production is leading to a structural supply deficit, which is driving up prices amid constant demand.
Particularly noteworthy is the trend toward long-term Bitcoin holdings, also known as “HODLing.” Data shows that over 70% of all Bitcoin has not been moved for more than a year. These strong hands further reduce the available supply on the market. At the same time, new sources of demand are emerging through Bitcoin ETFs, which have poured billions of dollars into the market since their introduction.
Technical innovations and second-layer solutions
To address the challenges of scaling and transaction fees, the Bitcoin ecosystem is continuously evolving. The Lightning Network, a second-layer solution, enables fast and low-cost transactions off the main blockchain. This technology could help ensure that even with low on-chain fees, there is enough economic activity to secure the network.
Further innovations such as Taproot, which was activated in 2021, improve the efficiency and privacy of Bitcoin transactions. These technical advances could help Bitcoin maintain its functionality as a means of payment and store of value even as scarcity increases.
Long-term challenges for the Bitcoin ecosystem
The Bitcoin community is engaged in intense discussion about possible solutions to the security budget problem. Proposals range from higher transaction fees to technical modifications to the protocol. Some experts argue that a higher Bitcoin price automatically generates higher absolute fee revenues and solves the problem. Others see the need for structural changes to the network.
Another important aspect is the geographical distribution of mining. While China used to dominate, mining has spread to other countries such as the US, Kazakhstan, and Russia following the 2021 ban. This decentralization strengthens the resilience of the network, but also brings new regulatory challenges.
The milestone of 20 million mined Bitcoin marks a turning point in the history of the cryptocurrency. While scarcity is likely to drive prices up in the short term, the network faces fundamental challenges in the long term. The next few years will show whether Bitcoin can maintain its position as digital gold without compromising network security. For investors, this development presents both opportunities and risks that must be carefully weighed.
