If Bitcoin is a calculator — brilliant at exactly one job — Ethereum is the computer: a general-purpose blockchain that runs programs. Those programs (smart contracts) now underpin most of what people actually do in crypto: trading without brokers, lending without banks, stablecoins, NFTs, and thousands of apps. Ethereum’s native token, ether (ETH), trades around $1,875 as of late July 2026 — a market value near $226 billion, about 10.1% of the total crypto market and second only to Bitcoin. Here’s what it is, and how the pieces fit together.

Calculator vs. computer

Bitcoin’s design is deliberately limited — it moves coins and little else, which makes it simple, robust and predictable. Ethereum’s founders, led by a then-19-year-old Vitalik Buterin, asked a bigger question: what if the blockchain itself were programmable? Buterin published the idea in late 2013, and the network went live in July 2015. The result is a shared world computer where anyone can deploy code that holds money and follows rules — and nobody, not even the author, can quietly rewrite those rules afterward. Developers pay the network in ETH to run their programs, which is why ETH gets called “digital oil” to Bitcoin’s “digital gold.”

A concrete example makes the idea click. A lending contract on Ethereum holds your ETH as collateral and lets you borrow stablecoins against it — no loan officer, no credit check. If the value of your collateral falls below a threshold written into the code, the contract sells it automatically to repay the loan. No phone call, no grace period, no favoritism: the rules execute identically for a $500 user and a $50 million fund. That combination — money plus unstoppable, impartial automation — is the entire proposition. Everything else in this article is either built on top of it or a consequence of it.

What’s actually built on it

  • DeFi. Trading, lending and borrowing protocols holding roughly $100–150 billion as of July 2026, most of it on Ethereum and its satellites. Full tour: what is DeFi.
  • Stablecoins. The majority of the ~$310–320 billion stablecoin market (USDT, USDC) lives on Ethereum as tokens — arguably the network’s killer app is dollars. Background: stablecoins explained.
  • NFTs and everything else. Collectibles, game items, domain names, DAOs. The NFT boom cooled hard after 2021, but the infrastructure never left.

The Merge: swapping the engine mid-flight

Until 2022, Ethereum was secured by mining, like Bitcoin. In September 2022, an upgrade called the Merge switched it to proof of stake — security from locked-up ETH instead of burning electricity — cutting the network’s energy use by an estimated 99%+ overnight. Two consequences matter to you. First, ETH stopped being issued to miners in large quantities: new issuance dropped sharply, and because a share of every transaction fee is burned, total supply can even shrink when usage is high. Second, holding ETH became productive — you can stake it and earn a share of network rewards.

Gas: the meter that’s always running

Every action on Ethereum — a transfer, a trade, a vote — costs gas: a fee paid in ETH that compensates validators and rations limited block space. Simple transfers cost a little; complex DeFi interactions cost more; and when everyone wants in at once (a hot mint, a market panic), fees can spike from cents to tens of dollars per transaction. Since 2021 a portion of every fee is burned, linking network usage directly to ETH scarcity. The mechanics deserve their own read: what are gas fees.

Staking: getting paid to secure the network

Under proof of stake, validators lock ETH as collateral and earn rewards — roughly 3% a year on Ethereum as of 2026, within the 2–8% range across major networks — for honestly proposing and checking blocks. Misbehave and the protocol destroys part of your stake (“slashing”). Running your own validator takes 32 ETH (about $60,000 at current prices) plus always-online hardware. Everyone else has two easier doors: staking through an exchange (simple, but custodial), or liquid staking protocols like Lido (~$16.7 billion locked as of July 2026), which accept any amount and hand you a tradable token that keeps accruing yield. Walkthrough: how to stake crypto.

Scaling: layer 2s do the heavy lifting

Ethereum’s base layer deliberately prioritizes security over speed — around 15 transactions per second. The scaling answer is layer 2s: separate fast chains (Arbitrum, Optimism, Base and others) that batch thousands of cheap transactions and anchor the results back to Ethereum for security. Since the 2024 Dencun upgrade slashed L2 data costs, typical L2 fees run in cents rather than dollars. For most users in 2026, “using Ethereum” actually means using an L2; the mainnet is the settlement layer underneath. The trade-off is that moving assets between L2s still involves bridges — historically the single most-hacked category in crypto, including the $625 million Ronin exploit in 2022.

The honest risks

  • Price risk. ETH is down with the rest of the 2026 bear market, and historically it falls harder than Bitcoin in downturns. Volatility is a feature of the asset, not a phase.
  • Complexity risk. More features mean a bigger attack surface. Every cycle’s biggest hacks involve smart contracts, not simple transfers.
  • Competition. Faster, cheaper layer-1s (Solana and friends) chase the same developers, and Ethereum’s own answer — L2s — fragments liquidity and user experience across many chains.
  • Regulation. US spot ETH ETFs have traded since July 2024, which legitimized access; but the tax and securities-law treatment of staking and DeFi remains a work in progress.

Where to go next

Check live numbers on our Ethereum page, learn the fee system properly in gas fees explained, and tour the biggest thing built on Ethereum in our DeFi guide. Weighing ETH against the big one? Start with what is Bitcoin.

This guide is educational only and is not financial advice. Crypto assets are volatile and you can lose everything you put in — read our full disclaimer.