What Is Ethereum? A Plain-English Guide to ETH Before You Buy
Ethereum is the second-largest cryptocurrency by market cap, but very few buyers can explain what the token actually does. Price charts won't tell you. The useful questions are narrower: where does ETH come from, where does it go, who pays fees, and does any of that value reach the people holding the token?
Here's a structured answer.
Ethereum Was Built to Run Programs, Not Just Payments
Bitcoin launched in 2009 with one job — a ledger for moving a single asset. It's intentionally limited and intentionally hard to change. In 2013, Vitalik Buterin argued that the same shared, tamper-resistant ledger could also run programs. Ethereum went live in 2015 as the result.
That one design decision is the reason DeFi, stablecoins, NFTs, rollups and tokenized treasuries exist. The trade-off is complexity: a programmable chain has more moving parts than a payments ledger. Neither model is "better." Bitcoin's pitch is digital gold with a fixed supply. Ethereum's pitch is to be the settlement layer that financial products get built on top of.
How ETH Supply Actually Works
ETH has no hard cap, which worries some investors. The mechanics matter more than the headline.
Creation: New ETH is minted only as rewards to validators securing the network. There is no other issuance path.
Destruction: The base fee on every transaction is permanently burned.
The net change decides whether supply expands or contracts. The 2022 Merge — the switch from proof of work to proof of stake — cut issuance by roughly 90% and dropped energy consumption by 99.9%. Annual inflation fell from 4–5% to under 1%. For a period after 2022, burns exceeded issuance and total supply shrank outright. Burns later eased as activity shifted to cheaper layer twos.
Circulating supply currently sits around 120–122 million ETH, growing roughly a quarter of a percent per year. That's small compared with the inflation rates many tokens have run.
Staking Turned ETH Into a Yield-Bearing Asset
Since the Merge, anyone can stake ETH to help validate transactions and earn a yield — currently in the 2.5–3% a year range. Roughly 39 million ETH, about a third of supply, is committed to validators. Staked ETH is not circulating, which tightens available float.
There are three broad approaches:
- Native staking — you lock ETH directly. Expect an entry queue (around 40 days currently) and a similar wait on exit.
- Liquid staking — you receive a receipt token you can use elsewhere.
- Spot ETFs — hands-off exposure, with staking-enabled funds now able to pass through network yield after US regulators clarified in March 2026 that staking rewards aren't securities.
One detail people miss: the yield is paid in ETH, not dollars. If you're holding long term and ETH appreciates, the effective yield compounds with it. A clear explainer on how staking crypto generates ongoing network yield is worth reading before you lock anything up.
For investors treating ETH as a multi-year position rather than a trade, the account wrapper matters as much as the asset. iTrustCapital is one route if you'd rather hold crypto inside a tax-advantaged retirement account instead of a taxable brokerage.
Ethereum's Share of DeFi and Real-World Assets
Ethereum holds roughly 53% of all DeFi total value locked. Solana sits near 7%, BNB near 6.6%, Base near 5.3%. Add every other chain together and they still total less than Ethereum alone. That share has drifted down from about 63% in January 2025 — partly because Base, Arbitrum and Optimism get counted as separate chains even though they're rollups that batch activity and settle back to Ethereum. There are roughly 73 active rollups. Roll their numbers back in and Ethereum's dominance is higher than the headline figure.
When comparing chains, match your metrics. TVL measures money deployed in applications. TVS includes idle and bridged assets the chain's security model protects, so it's always a bigger number. Compare TVL to TVL — the same rule applies when comparing market cap against fully diluted value.
On the institutional side, BlackRock's 2026 outlook expects around 65% of tokenized assets to live on Ethereum. Tokenized treasuries, money market funds and private credit grew from roughly $5.5 billion in early 2025 to about $37 billion. Stablecoins on Ethereum total roughly $157 billion.
Where the Thesis Could Break
Five honest risks: rollups absorbing fee revenue that would otherwise burn ETH on mainnet; faster, cheaper competing chains taking share; no fixed supply cap; staked ETH not being liquid ETH; and greater complexity than Bitcoin.
And the key warning for buyers: you can be right about the network and wrong about the token. Despite record ETF inflows and accelerating institutional adoption, ETH fell roughly 46% in the first half of 2026. Adoption and price are separate variables. One signal worth tracking is whether the ETH/BTC ratio shows Ethereum leading Bitcoin, the pattern that preceded the 2021 altcoin run.
Scored against four questions — does it earn fees, does earning reach the token, through what mechanism, and is burn bigger than issuance — Ethereum passes three of four. Not deflationary today, but close.
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