Ethereum is often described as the second most important cryptocurrency after Bitcoin. But that simplification does not capture why this project is so important in the history of digital assets.

When someone says “Ethereum,” they are not referring only to a single coin, but to an entire decentralized blockchain network and, at the same time, a software platform on which smart contracts and decentralized applications can run.

Ether is the core digital currency of the Ethereum network, identified on exchanges by the ticker ETH. Users pay transaction fees in it, and it is precisely thanks to ether that the network can operate and remain secure. Although thousands of other tokens and digital assets have been created on Ethereum, they are not ether itself.

They are separate tokens built on the Ethereum network, whereas ether is the original native currency of this blockchain infrastructure. It is the combination of a decentralized network, a programmable platform, and its own native currency that made Ethereum one of the most influential projects in the history of cryptocurrencies.

Bitcoin showed that value could be transferred over the internet without a bank and without a central authority. Ethereum built on that idea, but tried to take it much further. While Bitcoin was designed from the outset primarily as a system for transferring and storing digital money, Ethereum aimed to be more general.

Its ambition was not merely to create another currency, but an open blockchain on which entire applications, new tokens, digital marketplaces, financial protocols, and various forms of online services could be built without having to trust a single company or a single state. Bitcoin is a tool for sending value, while Ethereum is a platform for building with it.

Why Ethereum Was Created

To understand why Ethereum came into being, we need to go back to a period when Bitcoin was already working, but it was also becoming increasingly clear that its capabilities were limited. Bitcoin had its own scripting language, but it was not designed as a universal environment for more complex applications.

Ethereum founder Vitalik Buterin and others in the early crypto community began asking whether a blockchain could function as an open computational layer - in other words, as infrastructure on which not only money, but also contractual logic, digital ownership, or standalone applications could run. The original Ethereum white paper therefore described the project as a “next-generation smart contract and decentralized application platform.”

In the white paper, this ambition is stated even more precisely. Ethereum was meant to offer a blockchain with a built-in full-fledged programming language that would make it possible to create custom rules of ownership, transfers, and state changes.

In practice, that meant a fundamental shift: instead of a single-purpose system, an open platform was emerging on which any developer could build their own token, marketplace, financial product, or other decentralized system. In other words, Ethereum was not created to compete with Bitcoin merely as a “faster coin,” but to broaden the very idea of what a blockchain could be used for.

This is exactly where one of the most important ideas of the entire project lies. From the start, Ethereum tried to eliminate situations in which a user depends on an intermediary that controls the database, changes the rules, and can decide who is allowed to use the service.

If applications can run on a blockchain by themselves according to pre-written code, the internet changes from an environment controlled by platforms into one where open and publicly verifiable services can exist.

That is also why Ethereum is often described as a “decentralized world computer.” It is not a computer in the usual sense of the word, but a network of thousands of nodes that execute the same code and agree on what the valid result is.

Who Is Behind Ethereum

The original idea behind Ethereum came from Vitalik Buterin, who conceived the project at the end of 2013.

The official history on ethereum.org states that this was when the basic concept emerged and that Vitalik had already shared the Ethereum white paper in November 2013. The public introduction of the project followed in January 2014 at the North American Bitcoin Conference in Miami. That was the moment when the theoretical proposal began turning into a real project around which other developers, investors, and community members started to gather.

Ethereum, however, was not the work of a single person. The project’s official history states that it had a total of eight co-founders. Alongside Vitalik Buterin, one of the most important figures was Gavin Wood, who wrote the so-called Yellow Paper.

This is Ethereum’s technical specification - a detailed document describing how the network is supposed to function at the level of rules and how the Ethereum Virtual Machine works. While the white paper explained the project’s main idea, the Yellow Paper translated it into more precise technical language from which developers could actually build Ethereum.

Jeffrey Wilcke also played an important role by creating Geth, short for Go Ethereum. Geth is a software- an Ethereum client that allows a computer to connect to the Ethereum network, verify blockchain data, store its state, and execute the network’s rules. In other words, it is one of the main programs that makes Ethereum run in practice.

Other important co-founders included Joseph Lubin, who helped with early funding and later founded ConsenSys, and Mihai Alisie, who helped establish the project’s legal and organizational structure in Switzerland.

The other co-founders were Anthony Di Iorio, Amir Chetrit, and Charles Hoskinson. Even from this overview, it is clear that Ethereum did not emerge merely as a technical experiment, but as a broader project with development, organizational, and community backing from the very beginning.

The founders of Ethereum were among the first to view blockchain not only as a secure means of digital payment, but as a technology with much broader potential. That is an important point.

Ethereum did not grow only out of a desire to create a new asset, but from the conviction that blockchain could be used as a foundation layer for other digital systems. This view was groundbreaking for its time, and it is exactly what caused Ethereum to quickly distinguish itself from most other crypto projects of that era.

From Idea to Mainnet Launch

The path from white paper to network launch was relatively short, but very intense. According to official history, Vitalik shared the white paper in November 2013, publicly introduced the project in January 2014, and between July and August 2014 a public crowdfunding campaign took place during which the team raised approximately 31,000 BTC, then worth about $18 million. Those funds were meant to finance Ethereum’s further development and turn the concept into a truly functioning network.

An interesting detail is added by the Ethereum Foundation blog post “The First Year.” It states that the Swiss non-profit Ethereum Foundation was established on July 14, 2014, and that the Genesis Sale- the public sale of ether- began on July 24, 2014. The sale lasted 42 days and became an extraordinarily successful crowdfunding campaign for its time.

The blog also explains that ether was understood as “cryptofuel,” meaning the fuel meant to power computation and storage across the whole network. This is important for understanding ETH as well: from the very beginning, it was not just an investment asset, but a means intented to enable the operation of the entire platform.

After the fundraising came the network’s technical preparation. In April 2015, the Olympic testnet was launched- the final major trial version of Ethereum before the live launch. The testnet serves as a testing environment where developers and the community can try out the functioning of the entire network without the risk of working with real funds.

In the case of Olympic, this was not just ordinary testing, but a deliberate effort to stress the network as much as possible, look for weak points, test client stability, and verify that Ethereum could handle real-world operation. Only after it passed this phase could the main network be launched. That happened on July 30, 2015, when the first block - the so-called genesis block - was mined, definitively placing Ethereum among live blockchain networks.

What Exactly Did Ethereum Bring That Was New

Ethereum’s greatest innovation was smart contracts. These are programs stored directly on the blockchain that execute automatically if predefined conditions are met.

In the traditional world, many similar processes are handled by a bank, notary, exchange, platform, or another intermediary. In Ethereum, part of these rules moves directly into code. For example, when an application works with a loan, a token swap, or the transfer of a digital asset, all steps do not need to be approved by a single institution because the rules are executed by the network itself. It is thanks to smart contracts that people can create their own digital assets and decentralized applications that operate globally and continuously.

This created an entirely new type of internet environment. On Ethereum, decentralized finance, stablecoins, NFTs, games, decentralized social networks, and other types of applications gradually began to emerge.

The network is now home to thousands of cryptocurrencies and applications across DeFi, NFTs, gaming, decentralized social networks, and stablecoins. Ethereum is therefore often described as a programmable, scalable, secure, and decentralized platform on which digital technologies can be built. The historical importance of Ethereum lies not only in the fact that it introduced another major cryptocurrency, but in the fact that it opened the door to an entirely new segment of the blockchain economy.

The relationship between the Ethereum network and the ETH currency is also important. Ether is not just a coin traded on exchanges, but above all, the basic means that allows the network to function. Every operation on Ethereum requires a certain amount of computing power. Whether it is a simple transaction, the use of a decentralized application, or the execution of a smart contract, the network has to perform work measured by a unit called gas. A fee in ether is paid for this work - the so-called gas fee.

The more complex the operation, the more gas it consumes and the higher the resulting fee tends to be. This system is fundamentally important. On the one hand, it protects the network from spam and unnecessary congestion because carrying out a large number of operations is not free. At the same time, it creates economic incentives for validators who process and confirm transactions. Thanks to this, ETH is not just an investment asset, but a real fuel of the entire Ethereum network.

How Ethereum Worked in Its Early Years

When Ethereum launched in 2015, it functioned in the same way as Bitcoin, using the Proof of Work mechanism- mining. In practice, this meant that miners gathered pending transactions into a new block, and their computers then tried to find the correct solution to a cryptographic puzzle before everyone else. Part of this process was the so-called nonce, a number that the miner constantly changed during calculation until a hash satisfying the network’s rules was produced.

The higher the difficulty, the smaller the number of acceptable results and the more attempts were needed. Other nodes could then verify the correctness of the result very quickly. Unlike Bitcoin, where a new block is created on average roughly once every 10 minutes, blocks on Ethereum in the Proof of Work era arrived approximately every 13 seconds. Ethereum thus offered a faster network pace and quicker initial transaction confirmations, although final certainty still grew only with additional subsequent blocks.

Ethereum Mainnet, the main public Ethereum network, used the Ethash algorithm during the mining era. This was the mechanism according to which computational work has been performed. Ethash was a modified version of the Dagger-Hashimoto design and was intentionally created as a memory-hard algorithm. That meant that during mining, a “fast chip” alone was not enough - it was also necessary to work with a large volume of data in memory.

A key role in this was played by the so-called DAG, a multi-gigabyte dataset that was regularly refreshed. The purpose was to make it harder for ASIC devices - specialized chips made specifically for cryptocurrency mining - to dominate. By contrast, GPUs are ordinary graphics cards, originally intended mainly for graphics and gaming, but thanks to their design they are also well suited to parallel calculations in mining. Ethash has been designed so that GPU mining would remain competitive for a long time. ASICs for Ethash has emerged later, but according to the official documentation, graphics cards remained a viable and widespread option right up until mining was fully shut down.

For an outsider, mining can be imagined as a nonstop race to be the first to correctly “close” the next block of transactions. The successful miner could add the block to the blockchain and receive a reward in ETH as well as part of the transaction fees. Mining therefore did not mean only creating new coins. It was also the method by which the network has been secured, the order of transactions determined, and a single version of the blockchain’s history maintained. So when mining is described as the “lifeblood” of proof-of-work Ethereum, it means that without it the network could not function at all in that model.

Without miners, no new blocks would be created, transactions would not be confirmed, consensus on the correct state of the network would not arise, and the blockchain would lose its security mechanism. Proof of Work was therefore at the same time a way of producing blocks, defending against attacks, and economically incentivizing the participants who kept the network running.

How Ethereum Evolved and What It Had to Deal With

Like other major open-source projects, Ethereum did not rise in a straight line from the beginning. One of the first major tests came in 2016 with the event known as the DAO hack. At that time, some participants gained control over the smart contracts of the DAO project, and ether worth more than $50 million was stolen.

The community’s subsequent response led to a hard fork, after which two branches emerged: today’s Ethereum and Ethereum Classic, whose supporters left the original blockchain unchanged. This event was crucial for Ethereum because it showed that technological innovation also brings new types of risks, disputes, and decisions about how a decentralized community should respond to a crisis.

Despite this crisis, Ethereum continued to grow. In the following years, it became the main infrastructure for tokens, smart contracts, and the entire decentralized finance environment. Major stablecoins, decentralized exchanges, lending protocols, and NFT projects began to appear on Ethereum.

The more applications there were, however, the clearer the limits of the original architecture became: high fees when the network was heavily used, limited transmissivity, and the question of the long-term energy demands of Proof of Work. This has gradually led to one of the most important decisions in the project’s history - the transition to Proof of Stake.

When and Why Ethereum Stopped Being Mined

Ethereum stopped being mined on September 15, 2022, when the upgrade called The Merge took place. This was a fundamental change in which Ethereum moved from mining to a validator-based system. In other words, the network abandoned the Proof of Work mechanism and began operating on the principle of Proof of Stake.

The reason for this change was fundamental. While Proof of Work protected the network by making an attack require enormous amounts of hardware, electricity, and computational work. Proof of Stake bases security on economic incentives and financial risk.

Validators lock up ETH as collateral, receive rewards for honest behavior, and can lose part of their stake in the event of fraud or serious rule violations. The transition to Proof of Stake therefore dramatically reduced the network’s energy consumption (by roughly 99.95%) while also changing both its security model and its economic model.

It is also important to add that Ethereum did not stop being a decentralized blockchain because of this. Only the way the network makes the decision who creates new blocks and how it defends itself against so-called Sybil attacks has changed. A Sybil attack means a situation in which someone tries to gain disproportionate influence in the network by creating a large number of fake or controlled identities.

In Proof of Work, taking over the network in this way was expensive because of the cost of hardware and electricity. In Proof of Stake, it is expensive because an attacker would have to acquire and risk an enormous amounts of ETH. Put simply: in the past, power in the network was determined mainly by computing power. Today, it is determined by staked capital and validation rules.

From a practical point of view, this has meant the end of an entire era of the crypto industry. Before September 2022, Ethereum was one of the world’s biggest targets for GPU miners. After Proof of Stake, that business model on Ethereum main net came to a close, and many miners had to look for other networks or change their business completely.

Within the Ethereum ecosystem itself, however, this opened a way to further changes related to scaling, lowering costs, and improving usability. In other words, the end of mining was not the end of growth, but rather a requirement for further development.

The Development of Ethereum till Present Day

After the transition to Proof of Stake, Ethereum’s development focused more on scaling; on how the network can serve more users and more transactions without losing security or becoming too expensive to use. This is directly related to the so-called Layer 2 networks.

These are follow-up solutions that operate on top of the Ethereum, process part of the activity outside the main chain, and then send the resulting data back to Ethereum. The main network thus remains a secure and trustworthy base layer, while Layer 2 solutions help speed up activity and reduce fees for ordinary users.

A major step in this direction was the Dencun upgrade, activated on March 13, 2024. Thanks to it, Ethereum introduced a new way of storing temporary data for Layer 2 networks, which significantly helped lower their operating costs. Technically, this is called proto-danksharding, but simply put, it was an intermediate step intended to help Ethereum scale more cheaply and efficiently. It is a good example of the fact that Ethereum is not a finished and unchanging project, but a living protocol that continues to develop both its possibilities and its operational demands grow.

More important than the technical upgrades themselves, however, is what Ethereum made possible in practice. It is precisely thanks to smart contracts that applications began to emerge on Ethereum. They can automatically carry out predefined rules without the involvement of an intermediary.

The official documentation gives a simple example of a contract that holds money in escrow and releases it only after a certain date, or a contract that automatically transfers a digital title of ownership after payment. The same principle is used in financial applications as well - for example in token swaps, lending, stablecoins, and other automated financial agreements that operate according to code instead of decisions made by a single central institution.

Ethereum also opened the door to the tokenization of assets. This means that real-world or digital ownership can be turned into a token on the blockchain. Official Ethereum sources cite real estate, bonds, commodities, stocks, art, and collectibles as examples.

In addition, stablecoins (for example USDC) also emerged on Ethereum. Tokens pegged to a more stable value, such as the U.S. dollar, and used for digital payments. It is from this broader ecosystem that the concept of Web3 emerged. This usually refers to a new phase of the internet in which applications are not controlled only by large platforms, but rely more on decentralization, digital ownership, and direct user participation. Ethereum is one of the main infrastructures on which this world stands.

Today Ethereum is important not only as a cryptocurrency, but as a technological layer for a large part of the modern blockchain environment. Decentralized finance, NFTs, stablecoins, tokenized assets, and many other applications have emerged on it. The historical significance of Ethereum therefore lies not only in the fact that it introduced its own coin, but in the fact that it turned blockchain into a platform on which entire digital services and new forms of ownership can be built.

Conclusion

As we have shown, Ethereum did not arise as a mere copy of Bitcoin or just another digital coin without broader significance. Its main contribution was that it expanded the possibilities of blockchain and turned it into a programmable platform on which smart contracts, tokens, and decentralized applications can be created. That is precisely why Ethereum became one of the most important projects in the history of cryptocurrencies.

Its significance, moreover, does not lie only in its creation, but also in its subsequent development. From its launch in July 2015, Ethereum was mined for several years using Proof of Work. On September 15, 2022 it underwent a fundamental change in the form of The Merge when it moved to Proof of Stake and definitively ended the mining era. In doing so, it showed that it is not a closed project, but a living protocol that continues to evolve according to the needs of the entire network.

And that is where the real impact lies. Ethereum did not influence only the development of a single cryptocurrency but started an entirely new direction for the use of blockchain in digital finance, ownership, and internet services.

We will discuss everything the emergence of Ethereum has set in motion, and what impact it had on the crypto market and the broader economy in the next article of our educational section.