If Bitcoin’s pitch is digital money, Ethereum’s pitch is a global, programmable computer that anyone can build on. It’s the second-largest crypto asset by market value and the foundation for most of the decentralized finance and token ecosystem that’s grown up around crypto since its 2015 launch.
Where Ethereum came from
Ethereum was proposed in a 2013 white paper by programmer Vitalik Buterin, who argued that Bitcoin’s scripting language was too limited to support general-purpose applications, and that a blockchain with a built-in programming environment could support far more than just payments. The network launched in July 2015 after a public token sale funded its development. Unlike Bitcoin, Ethereum was designed from the outset to run arbitrary code, not just process transfers of a single native asset.
Smart contracts, in plain terms
A smart contract is simply a program stored on the Ethereum blockchain that executes automatically when predetermined conditions are met, and whose code and execution are visible on the public ledger. Instead of relying on a company’s server to run application logic, Ethereum lets that logic run on a decentralized network of computers, with the outcome enforced by the same consensus rules that secure the underlying ledger. This is the foundation for decentralized finance (DeFi) applications like lending protocols and decentralized exchanges, as well as token standards that let developers issue their own assets on top of Ethereum without building a blockchain from scratch.
The Ethereum Virtual Machine and gas fees
Smart contract code runs inside the Ethereum Virtual Machine (EVM), a standardized runtime environment that every full node on the network executes identically, which is what lets the network reach consensus not just on account balances but on the outcome of arbitrary program logic. Running any computation on Ethereum costs “gas,” paid in ETH, which compensates the network for the computational resources used and helps prevent spam or infinite-loop transactions from clogging the network. Gas costs fluctuate with network demand, and they’re a genuine, ongoing cost of using Ethereum directly that’s separate from any price movement in ETH itself.
The Merge: how Ethereum changed its own engine
For its first several years, Ethereum, like Bitcoin, used proof-of-work mining to secure the network. In September 2022, in an upgrade widely referred to as “the Merge,” Ethereum transitioned to proof-of-stake, where network security comes from validators who lock up (stake) ETH as collateral rather than from mining hardware. Validators are rewarded for correctly validating transactions and can be penalized (“slashed”) for malicious or faulty behavior. This changed Ethereum’s energy footprint dramatically and introduced staking as a new way to earn rewards directly from securing the network, though staking carries its own risks, including lock-up periods and slashing.
How US regulators have approached ETH
The CFTC has publicly described Ether, like Bitcoin, as a commodity, and spot Ether ETFs were approved in the US in mid-2024, following the same generic-listing-standards and fund-registration mechanics described in our spot ETF guide. Regulatory treatment of specific activities built on Ethereum, however, like individual token sales or staking-as-a-service programs, still gets evaluated under the same Howey-based framework covered in our Howey test guide, on a case-by-case basis. In other words, ETH itself and a token issued by a project built on top of Ethereum can land in very different regulatory categories, even though both technically live on the same network.
Layer 2s: scaling without abandoning Ethereum’s security
As demand for Ethereum block space grew, gas fees on the base network (often called “Layer 1” or the mainnet) could rise sharply during periods of high activity. A major response has been the growth of “Layer 2” networks — separate chains that process transactions more cheaply and quickly, then periodically post summarized proof of that activity back to Ethereum’s base layer, inheriting much of its security while reducing everyday costs. Rollups are the most common Layer 2 design in current use. This layered architecture is Ethereum’s primary strategy for scaling transaction throughput without abandoning the decentralization and security properties of its base chain. For everyday users, this mostly shows up as a choice: interacting directly with Ethereum mainnet costs more in gas but settles with the base chain’s full security guarantees, while interacting through a Layer 2 is typically cheaper and faster, with security that ultimately still traces back to Ethereum itself once transactions are finalized.
How Ethereum’s issuance works today
Unlike Bitcoin, Ethereum does not have a hard, fixed maximum supply written into its original design. Under proof-of-stake, new ETH is issued to reward validators for securing the network, while a portion of transaction fees is separately burned (permanently removed from circulation) under a mechanism introduced in 2021. Depending on network activity, issuance and burning can roughly offset each other, or one can outweigh the other, meaning ETH’s total supply can rise or fall over time depending on usage — a different dynamic from Bitcoin’s fixed, disinflationary schedule. For current circulating supply, see our live Ethereum page rather than any number in this guide.
What people actually build on it
Ethereum hosts a wide range of applications: decentralized exchanges and lending protocols that let users trade or borrow without a traditional intermediary, stablecoins (discussed in our stablecoin regulation guide) that circulate largely on Ethereum and Ethereum-compatible networks, and non-fungible tokens (NFTs) representing unique digital or tokenized real-world assets. Other blockchains have since launched with similar or competing designs, some explicitly EVM-compatible so that Ethereum-based applications can be ported over relatively easily. Because so much of DeFi’s smart-contract infrastructure originated on Ethereum, understanding how it works is also foundational to understanding most of the newer chains and applications that followed it.
Not financial advice. This guide is educational and explains how a rule, market, or process works. It is not a recommendation to buy, sell, or hold any asset, and Crypto News US does not know your financial situation. Crypto assets are volatile and can lose value quickly; do your own research and consider talking to a licensed financial adviser before making decisions.
Frequently asked questions
Do I need to run my own Ethereum node to use it?
No. Most users interact with Ethereum through a wallet application or exchange that connects to the network on their behalf; running your own node is optional and mainly relevant for developers, validators, and users who want maximum independence from third-party infrastructure.
What’s the difference between ETH the asset and Ethereum the network?
Ethereum is the network and protocol; ETH is its native asset, used to pay gas fees, stake as a validator, and serve as a base unit of value across applications built on the network, similar to how “Bitcoin” the network and “bitcoin” the asset are related but distinct concepts.
Is staking ETH risk-free?
No. Staked ETH can be subject to lock-up or withdrawal delays, and validators can be penalized for downtime or malicious behavior. Staking-as-a-service programs offered by third parties also carry counterparty and, potentially, securities-law considerations depending on how they’re structured.
What is a Layer 2 network, in one sentence?
A Layer 2 is a separate network that processes transactions cheaply and quickly while periodically anchoring proof of that activity back to Ethereum’s base chain, inheriting much of its security without the same per-transaction cost.
Frequently asked questions
Do I need to run my own Ethereum node to use it?
No. Most users interact through a wallet or exchange that connects to the network for them; running a node is optional.
What is the difference between ETH the asset and Ethereum the network?
Ethereum is the network and protocol; ETH is its native asset used for gas fees, staking, and value transfer.
Is staking ETH risk-free?
No. Staked ETH can face lock-up delays and validators can be penalized for downtime or malicious behavior.
What is a Layer 2 network?
A separate network that processes transactions cheaply and quickly, then anchors proof of that activity back to Ethereum base chain for security.
Last updated August 12, 2026
Explainers Editor at Crypto News US, writing beginner guides, wallet-security walkthroughs and plain-English altcoin basics for newcomers, from Miami.