This FAQ covers the basics of Ethereum (eth), the second-largest cryptocurrency by market capitalization. Whether you're new to crypto or just curious about eth, this guide explains what it is, how it works, and how to get started in simple terms.

What is eth (Ethereum)?

Ethereum (eth) is a decentralized blockchain platform that enables developers to build and deploy smart contracts and decentralized applications (dApps). It's the second-largest cryptocurrency by market cap, after Bitcoin, and its native token, ether (ETH), is used to pay for transaction fees and computational services on the network.

Unlike Bitcoin, which focuses primarily on peer-to-peer digital money, Ethereum is designed as a global, open-source platform for programmable money and decentralized finance (DeFi). It was proposed by Vitalik Buterin in 2013 and launched in 2015.

How does Ethereum work?

Ethereum works as a distributed ledger that records all transactions and smart contract executions in a secure, tamper-proof way. It uses a network of computers (nodes) that run the Ethereum software to validate and process transactions, ensuring consensus without a central authority.

Smart contracts are self-executing agreements with the terms directly written into code. When conditions are met, the contract automatically executes, eliminating the need for intermediaries. This enables a wide range of applications, from decentralized finance (DeFi) to NFTs.

How do I buy eth?

You can buy eth (ether) on most cryptocurrency exchanges, such as Coinbase, Binance, and Kraken, using fiat currency or other cryptocurrencies. First, create an account on a reputable exchange, complete identity verification, then deposit funds and place a buy order for ETH.

Alternatively, you can use peer-to-peer platforms or decentralized exchanges (DEXs) that allow swapping other cryptocurrencies for ETH. Always use secure wallets to store your ETH, preferably a non-custodial wallet where you control the private keys.

Why is eth valuable?

Ethereum's value comes from its utility as the leading platform for smart contracts and decentralized applications, with a large and active developer ecosystem. It is the foundation for most DeFi projects, NFTs, and many Web3 applications, which drives demand for ETH to pay for transaction fees (gas) and interact with these applications.

Additionally, Ethereum's transition to Proof-of-Stake (PoS) in 2022 introduced staking, allowing users to earn rewards by locking up ETH to secure the network. This reduces supply in circulation and can create deflationary pressure over time, potentially increasing its value.

What is Ethereum 2.0 (the Merge)?

Ethereum 2.0, also known as Eth2 or the Merge, was a major upgrade that transitioned the network from Proof-of-Work (PoW) to Proof-of-Stake (PoS) consensus mechanism. The Merge occurred on September 15, 2022, significantly reducing Ethereum's energy consumption by over 99% and enabling future scalability improvements.

With PoS, validators stake at least 32 ETH to propose and validate new blocks, earning rewards in return. This upgrade also laid the groundwork for sharding and other enhancements to increase transaction throughput and lower fees.

What are gas fees on Ethereum?

Gas fees are transaction fees paid in ETH to compensate validators for processing and validating transactions on the Ethereum network. They are determined by network congestion and the complexity of the transaction; during high demand, fees can spike significantly.

You can estimate gas fees using tools like Etherscan or wallet interfaces. To reduce costs, consider transacting during off-peak hours or using Layer 2 solutions like Arbitrum or Optimism, which offer lower fees by processing transactions off-chain and settling on Ethereum.

How is Ethereum different from Bitcoin?

Ethereum and Bitcoin are both decentralized cryptocurrencies, but they serve different purposes. Bitcoin was created as a digital currency and store of value, while Ethereum is a platform for building decentralized applications and executing smart contracts.

Key differences include: block time (Ethereum ~12 seconds vs. Bitcoin ~10 minutes), consensus mechanism (Ethereum uses PoS, Bitcoin uses PoW), and supply (ETH has no hard cap, while Bitcoin is capped at 21 million). Ethereum's programmability enables a much wider range of use cases beyond simple payments.

Is Ethereum a good investment in 2026?

Investing in Ethereum carries risks and potential rewards, as with any cryptocurrency. As of 2026, Ethereum remains a leading blockchain with significant adoption, but its price is highly volatile and subject to market sentiment, regulatory changes, and technological developments.

Before investing, consider your financial situation and risk tolerance. Diversify your portfolio, do thorough research, and only invest what you can afford to lose. Some analysts see long-term value in Ethereum due to its network effects and ongoing upgrades, but past performance does not guarantee future results.

Final Thoughts

Ethereum is a revolutionary technology that has expanded the possibilities of blockchain beyond digital currency. For beginners, understanding its core concepts—smart contracts, gas fees, and the transition to Proof-of-Stake—is essential to navigate the ecosystem.

Whether you're looking to invest, build, or simply learn, Ethereum offers a rich and dynamic environment. Always stay informed and approach with caution, as the crypto space is ever-evolving.