Ethereum vs bitcoin: key differences in purpose, supply, risk

Ethereum vs bitcoin comes down to purpose. Bitcoin is digital money with a hard cap of 21 million coins, secured by mining (proof-of-work). Ethereum is a programmable platform for smart contracts: ether (ETH) pays for computation, there is no fixed supply cap, and the network is secured by validators who lock up ETH (proof-of-stake). Those design choices lead to different supply dynamics, different risks and different price behavior.

What is the difference between Ethereum and Bitcoin?

Satoshi Nakamoto's white paper describes Bitcoin as "a peer-to-peer electronic cash system": the network tracks one thing — who owns which coins. ethereum.org describes Ethereum as "a decentralized platform for applications and assets," powered by its native currency, ether. Ethereum's chain stores not only balances but also program code and its state: exchanges without a middleman, lending protocols, stablecoins, tokens and NFTs.

A simple way to think about it: bitcoin is digital gold plus a settlement network for a single asset; Ethereum is a shared world computer, and ETH is what you pay to use it. Both are open and ownerless, but they solve different problems — so asking which one is "better" is a bit like comparing gold with shares in a cloud-computing company.

Bitcoin vs Ethereum: side-by-side comparison

Sources: ethereum.org comparison, ethereum.org on proof-of-stake (32 ETH and three pieces of client software per validator), and ultrasound.money for 30-day ETH issuance. For how bitcoin's block reward shrinks over time, see our bitcoin halving guide.

How each network is secured: mining vs staking

On Bitcoin, the next block is added by whoever first solves a computational puzzle. That takes hardware and electricity, so attacking the network means outspending honest miners on energy and machines.

Ethereum dropped mining on September 15, 2022, in an upgrade known as The Merge. Since then, blocks are proposed by validators, each of whom deposits 32 ETH into the deposit contract and runs three pieces of software. Misbehavior — such as signing two competing blocks — can lead to some or all of that stake being destroyed. ethereum.org estimates the switch cut the network's energy use by about 99.95%.

The trade-off: under proof-of-stake, influence scales with the amount of ETH locked up, and large staking providers (exchanges and liquid staking protocols) run a sizable share of validators. Bitcoin advocates see mining as a more neutral form of security; Ethereum advocates point to lower costs and yield for holders. It is a debate about trade-offs, not about one design being "wrong."

Supply: a 21 million cap vs a floating ETH supply

This is the difference holders feel most.

Bitcoin. The block reward is 3.125 BTC. At roughly 144 blocks a day, that is about 450 BTC daily, or about 164,000 BTC a year — roughly 0.8% of the 20.1 million coins in circulation (CoinGecko data on our bitcoin page, Oct 22, 2026). By our data, the next halving is 77,360 blocks away, estimated for April 2028, and will cut issuance in half again. No more than 21 million BTC can ever exist.

Ethereum. There is no cap, and supply can move in both directions: 1. Validators receive newly issued ETH. According to ethereum.org's issuance breakdown, The Merge cut issuance by roughly 88%, and the amount now depends on how much ETH is staked — more stake means more total rewards. 2. The base portion of every transaction fee is burned under EIP-1559: "The base fee is always burned," and validators keep only the priority tip.

When the network is busy and fees are high, the burn can outpace issuance and ETH turns deflationary. When activity is quiet, supply grows. That is why the "ultrasound money" narrative holds only for certain periods.

Ethereum vs bitcoin by the numbers: Oct 22, 2026

Live figures as of 18:00 UTC (2 PM ET) on Oct 22, 2026 (our CoinGecko and Binance data; ETH supply from ultrasound.money):

What the table shows:

• Bitcoin is about 5.6 times larger by market cap, and one ETH was worth roughly 0.0293 BTC.
• ETH has fallen harder. Over both the month and the year, ether lost noticeably more than bitcoin — a typical pattern when money retreats to the most liquid asset. We cover how that ties into altcoin season in bitcoin dominance explained.
• ETH supply is growing. Over the 30 days from Sep 22 to Oct 22, 2026, circulating supply rose by 86,702 ETH while only 2,403 ETH was burned. Annualized, that is about +0.86% — slightly above bitcoin's current issuance (~0.8%). Since The Merge, supply is up 1.63 million ETH (+1.35%). The reason is a quiet network: only 61 ETH was burned over the 24 hours to Oct 22.
• A lot of ETH is locked up. Validator balances hold about 44.2 million ETH according to ultrasound.money — roughly 36% of all ether.

For live prices and market signals, see the CoinLab dashboard and the coin pages for bitcoin and ethereum.

Who buys BTC and ETH, and how they trade

Both assets trade on every major exchange and in perpetual futures, but demand comes from different places.

• Bitcoin is bought as "digital gold": public companies hold it on their balance sheets, and US spot bitcoin ETFs have traded since January 2024 (SEC approval order dated Jan 10, 2024). Learn how to read their flows in our bitcoin ETF flows guide.
• Ether is both an asset and the network's fuel. Demand depends on app activity, stablecoins and layer-2 networks. The SEC approved listing spot ether ETPs on NYSE Arca, Nasdaq and Cboe BZX on May 23, 2024.
• Volatility. Historically ETH swings harder than BTC in both directions, as the numbers above also show.

Common mistakes when comparing them

1. "No cap means ETH inflates forever." Post-Merge issuance is modest and partly offset by the burn. But "ETH is deflationary" is not always true either: as of Oct 22, 2026, supply was growing.
2. "Faster blocks mean Ethereum is better." Block time is an engineering trade-off. Bitcoin deliberately gives up speed for simplicity and robustness, and pushes fast payments to a second layer (Lightning).
3. Confusing the network with the coin. Ethereum is the network; ether (ETH) is the coin. Thousands of tokens live on Ethereum, and none of them is ETH.
4. Sending coins to the wrong network. You cannot send BTC to an ETH address. "Wrapped" bitcoin on Ethereum (such as WBTC) is a token backed by a custodian's promise, not BTC itself.
5. Comparing unit prices. ETH is cheaper than BTC per coin, which says nothing about value — market cap and supply are what matter.

Limitations

A technical comparison does not tell you which coin will go up. ETH issuance changes every block depending on network demand and the amount staked, so the figures above are a snapshot of one date. Rules also differ by country: some tax staking rewards as income, some restrict exchange staking. Check the rules where you live before acting.

FAQ

Is bitcoin or Ethereum better? They are different tools. Bitcoin is a bet on scarce digital money; Ethereum is a bet on demand for blockchain applications. Many investors hold both.

Why is ETH cheaper than BTC? Per-coin price depends on how many coins exist: about 122 million ETH versus about 20 million BTC. Compare market caps instead — $1.632T for bitcoin versus $290.4B for Ethereum on Oct 22, 2026.

Can you still mine ether? No. Since September 15, 2022, Ethereum has run on proof-of-stake: new ETH goes to validators for their stake, not to miners.

Will ETH ever have a supply cap like bitcoin? The protocol has no fixed cap. Supply is governed by validator issuance and EIP-1559 fee burning.

This is not investment advice.