Bitcoin vs Ethereum: Differences, Use Cases & Investment Thesis

Introduction

Over the 12 months to 20 October 2026, ether (ETH) lost 38.5% of its dollar value and bitcoin (BTC) 25.0%, yet the two moved in near lockstep, with a weekly correlation of 0.96. Bitcoin and Ethereum are often treated as interchangeable crypto bets, but they differ in design, supply rules, security and use. This comparison sets them side by side using market data dated 4 November 2026 and a weekly price test to 16 October 2026: market size, supply growth of 0.82% for Bitcoin and 0.83% for Ethereum, security spending, DeFi and stablecoin footprints, and volatility. It then lists what each investment thesis depends on and what would break it, using the same dated evidence throughout. The article gives no price forecast and does not say which coin to buy. It shows what the evidence supports.

What Were Bitcoin and Ethereum Each Designed to Do?

Bitcoin and Ethereum are the two largest cryptoassets by market capitalization (CoinPaprika API, 2026-11-04), and each was built for a different job. Bitcoin is a ledger for a scarce digital money. Ethereum is a ledger that also runs programs (ethereum.org, 2025). That difference in purpose explains nearly every contrast in supply, security and risk below.

Bitcoin: a scarce digital money

Bitcoin went live on 3 January 2009 (Bitcoin.org, 2008), after a 2008 white paper proposed an electronic cash system with no trusted third party. Its purpose was moving value between people without a bank. Its software caps supply at 21,000,000 coins (BTC) and pays miners a block subsidy that halves every 210,000 blocks, roughly every four years (Bitcoin protocol, 2009). The network supports a deliberately small set of operations: transfers, multi-signature conditions and simple timelocks. The first block quoted a newspaper headline on bank bailouts, a pointed reminder of what it was built to avoid. That narrow scope keeps the rules easy to audit and the code rarely changed. A companion guide explains what Bitcoin is ↗ and how a transaction confirms, so this comparison treats Bitcoin as the benchmark for hard-to-change money.

Ethereum: a programmable settlement layer

Ethereum launched on 30 July 2015 with a different premise: a shared computer that anyone can program. Vitalik Buterin proposed the design in a 2013 white paper (ethereum.org, 2025). Developers deploy smart contracts, which are programs that hold and move assets under fixed rules. Users run them by paying fees in ether (ETH), priced in a unit of computation called gas. Those contracts power stablecoins, lending markets, exchanges and tokenized assets, all settled on one ledger. The Ethereum Virtual Machine (EVM) executes every contract identically on every node. ETH therefore has two jobs: it pays for computation, and it is the collateral that backs the validators securing the chain (ethereum.org, 2025).

What the two share

Both networks are public ledgers that no company runs. Anyone can operate a node, check every transaction and read the full history (Bitcoin.org, 2008; ethereum.org, 2025). Both use a native coin to price scarce block space. Both rely on a global set of participants, not an operator, to agree on the next block. They differ in how that agreement is reached and in what the ledger is asked to do. Comparing them as investments therefore means comparing a money-like asset with a platform asset. Bitcoin's value rests on being a credible store of value ↗. ETH's rests on demand for the platform's block space and collateral.

Market prices show how differently investors currently value those two designs.

How Do Bitcoin and Ethereum Compare on Market Data Today?

On 4 November 2026 Bitcoin traded at $78,269 and Ethereum at $2,316.70, with Bitcoin 37.95% and Ethereum 53.14% below their all-time highs (CoinPaprika API, 2026-11-04). Bitcoin's market capitalization is about 5.6 times Ethereum's. The gap in drawdown matters as much as the gap in size.

Size and price today

Market capitalization, price multiplied by circulating supply, is the fair size comparison. A single coin's dollar price says little: Bitcoin has 20,107,844 coins in circulation and Ethereum about 122.19 million. Bitcoin's market capitalization was $1.574 trillion on 4 November 2026, against $283.1 billion for Ethereum, which ranks second (CoinPaprika API, 2026-11-04). Bitcoin held 57.2% of the $2.753 trillion crypto market ↗ and Ethereum 10.3%. Ethereum traded $6.9 billion in the prior 24 hours, 2.4% of its market cap, while Bitcoin traded $19.0 billion, 1.2% of its own. Smaller assets turn over a larger share of their value each day, and Ethereum follows that pattern.

Distance from the all-time high

Ethereum peaked on 24 August 2025 at $4,946.23, six weeks before Bitcoin's 6 October 2025 high of $126,173 (CoinPaprika API, 2026-10-21). From 6 October 2025 to 30 June 2026, daily closes fell 53.1% for Bitcoin and 66.5% for Ethereum (own calculation from Yahoo Finance closes). Both then recovered: from 30 June 2026 to 20 October 2026 Bitcoin gained 41.6% and Ethereum 55.9%. Over the 12 months to 20 October 2026, Bitcoin lost 25.0% and Ethereum 38.5%. Over 12 months Ethereum's loss was 13.5 percentage points larger than Bitcoin's. Ethereum fell further and rebounded harder, which is the pattern of a higher-risk asset. The October 2025 to June 2026 stretch is the reference drawdown of this cycle for both.

The ETH/BTC ratio

The ETH/BTC price ratio, how many bitcoin one ether buys, stood at 0.0296 on 4 November 2026 (own calculation from CoinPaprika). It was 0.0533 on 1 January 2024, 0.0421 on 24 August 2025 and 0.0376 on 6 October 2025 (Yahoo Finance daily closes). Ether has therefore lost about 44% of its value against bitcoin since the start of 2024. The lowest ratio since November 2017 was 0.0164 on 6 September 2019 (Yahoo Finance daily closes). A falling ratio means Ethereum underperformed Bitcoin, whatever the direction of the dollar prices.

Data current as of November 2026.

Both assets sit far from their peaks, and the structure underneath starts with how each manages its coin supply.

Is Bitcoin's Fixed Supply Really Stricter Than Ethereum's Issuance and Burn?

Bitcoin's supply is capped in code, and Ethereum's is a policy that has already changed twice. Measured over the last 12 months, though, both grew by about 0.8%. The difference lies in who can alter the rule, not in the current growth rate.

Bitcoin's schedule

Bitcoin pays 3.125 BTC per block, a rate set at block 840,000 on 20 April 2024. At 144 blocks a day that issues 164,250 BTC a year, 0.82% of supply (own calculation from protocol rules). Circulating supply was 20,107,844 BTC on 4 November 2026, 95.75% of the 21,000,000 cap, which leaves 892,156 BTC to issue (CoinPaprika API, 2026-11-04). Halvings in 2012, 2016, 2020 and 2024 cut the subsidy from 50 BTC to 3.125 BTC. The next, at block 1,050,000 around spring 2028, cuts it to 1.5625 BTC. Nothing is burned, so supply only rises, and coins lost to forgotten keys never return.

Ethereum's issuance and burn, measured

Ethereum has no cap. Validator rewards create about 1.09 million ETH a year, while Ethereum Improvement Proposal 1559 (EIP-1559), live since the London upgrade of 5 August 2021, burns each block's base fee. In total 4,643,275 ETH had been burned since then by 4 November 2026, 2,019,966 of it since the Merge. Measured at ultrasound.money on 4 November 2026, supply was 122,187,988 ETH, up 1,003,637 ETH or 0.83% in 12 months (ultrasound.money API, 2026-11-04). Over 30 days the burn ran at about 37,100 ETH a year, offsetting only 3.4% of issuance (ultrasound.money API, 2026-11-04). Net growth at that pace is 0.86% a year. Supply is 1.38% above the 15 September 2022 Merge level after falling to a low of 120,063,130 ETH on 5 April 2024.

What moves ETH supply from here

ETH supply follows two variables: how much ETH is staked and how much block space people buy. Issuance rises with the square root of total staked ETH. On 4 November 2026, 44,246,327 ETH, or 36.2% of supply, was staked, by the effective-balance sum ultrasound.money reports (ultrasound.money API, 2026-11-04). Burn rises when users compete for block space, and cheap block space is why recent burn is small. The Merge itself cut issuance by about 78%. Today's 1,089,249 ETH a year compares with the 4,930,875 ETH a year that proof of work would have issued (ultrasound.money API, 2026-11-04). Because developers set these parameters, a future upgrade can change them again.

Data current as of November 2026.

Both coins ended up with similar supply growth today, so security design and cost become the sharper point of difference.

How Do Proof of Work and Proof of Stake Secure the Networks?

Bitcoin secures its ledger with energy and hardware, and Ethereum secures its with locked capital. Both make rewriting history expensive, but they spend and risk different resources to do it. Measured in dollars issued to defenders each year, Bitcoin spends about five times more than Ethereum.

Proof of work

In proof of work (PoW), miners compete to find a hash below a network-set target ↗. The winner adds the next block roughly every 10 minutes. Network hashrate was about 1,020 exahashes per second (EH/s) on 4 November 2026, with difficulty at 148.4 trillion (mempool.space API, 2026-11-04). It peaked near 1,160 EH/s in early October 2025 (CoinShares, 2026). An attacker rewriting a block must redo its work and every block after it. The cost is hardware and electricity: a Cambridge survey published in April 2025 estimated about 138 terawatt-hours a year for mining (Cambridge Centre for Alternative Finance, 2025). Transaction fees were 0.59% of miner revenue over the 144 blocks to 4 November 2026.

Proof of stake

In proof of stake (PoS), validators lock ETH as collateral for the right to propose and vote on blocks. A validator needs 32 ETH minimum, and the Pectra upgrade of 7 May 2025 raised the maximum per validator to 2,048 ETH (ethereum.org, 2025). Ethereum produces a block slot every 12 seconds and finalizes blocks after two 32-slot epochs, about 12.8 minutes. Validators that sign conflicting blocks lose staked ETH through slashing, and an attacker would need a majority of staked ETH while risking its loss. The Merge on 15 September 2022 cut electricity use by about 99.99% (Crypto Carbon Ratings Institute, 2022). On 4 November 2026, 44,246,327 ETH, worth about $102.5 billion at that day's price, secured the chain.

The security budget compared

Defenders are paid in new coins. Bitcoin's subsidy of 164,250 BTC a year was worth $12.9 billion at $78,269. Ethereum's issuance of about 1,089,000 ETH was worth $2.5 billion at $2,316.70 (own calculation, 4 November 2026; fees excluded). Bitcoin's budget is 5.1 times larger. Both dollar figures move with price, so the ratio shifts whenever either coin moves. Ethereum counters with capital at risk: the $102.5 billion staked is exposed to slashing. Bitcoin's fee income is thin at 0.59% of miner revenue. Its security after the 2028 halving therefore depends on price and fees, a risk covered in the investment-thesis section.

Data current as of November 2026.

Security describes how each chain protects itself, while use cases describe what the protection is for.

What Are Bitcoin and Ethereum Actually Used For Today?

Bitcoin is mostly held, and Ethereum is mostly used. On 4 November 2026 Ethereum held 53.5% of decentralized finance (DeFi) value locked and 47.0% of stablecoin supply (DefiLlama API, 2026-11-04). Bitcoin's largest on-ramp is the exchange-traded fund, with 1,291,415 BTC held across 14 US spot products on 20 October 2026.

What Bitcoin is used for

Bitcoin's dominant use is holding it as a scarce asset, whether directly, through a spot exchange-traded fund (ETF), or on a company balance sheet. The 14 US spot Bitcoin ETFs held 1,291,415 BTC on 20 October 2026, 6.1% of the 21 million cap (BitcoinTreasuries and issuer data, 2026-10-20). Payments exist, but base-layer capacity is small by design. The Lightning Network ↗, a payments layer built on top, showed 3,203 BTC of public channel capacity on 4 November 2026, by the count of mempool.emzy.de, a community mempool instance used because mempool.space's own Lightning statistics stopped updating (mempool.emzy.de API, 2026-11-04). DefiLlama tracks $4.2 billion locked in protocols on Bitcoin, 5.0% of all DeFi value and sixth among chains (DefiLlama API, 2026-11-04). Bitcoin works as collateral and savings more than as a platform.

What Ethereum is used for, measured

Protocols on Ethereum held $44.3 billion of the $82.8 billion locked across 420 chains on 4 November 2026. Base, Solana, BNB Smart Chain and Tron each held $5.0 to $6.0 billion (DefiLlama API, 2026-11-04). Ethereum also hosted $137.0 billion of the $291.6 billion in stablecoins, ahead of Tron at $94.0 billion. A stablecoin is a token pegged to a currency, usually the US dollar, so these balances measure dollars settled on Ethereum rather than demand for ETH itself. DefiLlama counts layer 2 networks, which settle back on Ethereum, as separate chains, so these figures understate Ethereum's wider footprint. Fees for using it vary with demand, a pattern explained in a guide to how Ethereum gas fees work ↗.

Exchange-traded access

Both coins have US spot ETFs. Eleven spot Ether funds trade, nine from 23 July 2024, with sponsor fees from 0.14% to 2.50% and six staking part of their ETH, according to a compilation of issuer filings (GrowYourEthereum, 2026-10-19). BlackRock's ETHA alone held about 3.03 million ETH on 3 November 2026: 134,093,284 shares outstanding at 904.80 ETH per 40,000-share basket, as published by the issuer (iShares, 2026-11-03). Net inflows totalled $12.97 billion from launch to 16 October 2026 (Farside Investors), but the US spot Ether funds then recorded about $1.61 billion of net outflows across October as a whole, by SoSoValue's count (Cointelegraph, 2026). Staking inside a fund is something a Bitcoin fund cannot offer, because Bitcoin has no native yield. A separate guide to how spot bitcoin ETFs work ↗ covers structure and fees.

Use cases explain demand, and the price history shows how holders experienced that demand.

How Differently Do Bitcoin and Ethereum Behave as Investments?

Ethereum has been the more volatile of the two in every year since 2018 except 2023. It moves closely with Bitcoin but loses more in the weeks Bitcoin falls. Both findings come from the same weekly test: 466 weekly closes from 10 November 2017 to 16 October 2026 (own calculation from Yahoo Finance data).

Volatility

Annualized volatility is the standard deviation of weekly log returns multiplied by the square root of 52. It was 65.9% for Bitcoin and 84.9% for Ethereum over the full window. Since 2020 the figures were 60.4% and 79.9%, and over the last 52 weeks 44.3% and 60.4%. The same weekly method gave Bitcoin 67% over 2015 to October 2026 in the companion test against gold, which used blockchain.com prices. At 84.9% a year, Ethereum's typical weekly move is about 11.8%, against 9.1% for Bitcoin at 65.9%. Ethereum's volatility exceeded Bitcoin's in eight of nine calendar years, with 2023 the exception at 51.6% against 55.2%.

Correlation and beta

Weekly returns of the two moved together with a correlation of 0.75 over the full window and 0.83 since 2020. Over the last 52 weeks it reached 0.96, the highest in the test window (own calculation), and the rolling 52-week figure never fell below 0.52. Ethereum's beta to Bitcoin, its average move per 1% Bitcoin move, was 0.97 over the full window and 1.31 over the last 52 weeks. The pair offers little diversification against each other in a downturn. In weeks Bitcoin fell more than 5%, Ethereum lagged it in 64 of 91. In 113 weeks Bitcoin rose more than 5%, Ethereum beat it in only 52 (own calculation from Yahoo Finance closes).

Drawdowns

Drawdown measures the fall from a previous peak, and both assets have fallen far. On daily closes since 10 November 2017, Bitcoin's worst drop was 83.4%, from $19,497 on 16 December 2017 to $3,237 on 15 December 2018. Ethereum's was 94.0%, from $1,396 on 13 January 2018 to $84 on 14 December 2018. Ethereum closed more than 50% below its prior high on 59.8% of days, Bitcoin on 40.8%. A drawdown of that size is a feature of the asset class, not a one-off, and neither asset has yet shown immunity to it. Nearly six in ten Ethereum trading days since late 2017 closed more than 50% below a prior high.

Those risk numbers frame what each investment thesis has to survive.

What Does Each Investment Thesis Depend On, and What Would Break It?

An investment thesis is a set of conditions that must hold, so each can be checked against evidence. This section lists what each bet needs and what would falsify it. It makes no price forecast and does not recommend either coin.

The Bitcoin bet

The Bitcoin thesis rests on three conditions. First, the 21,000,000 cap must stay unchanged, and the failed Bitcoin Improvement Proposal 110 (BIP-110) soft-fork push of 2026 showed how strongly node operators resist rule changes (bitcoin/bips #2245, 2026). Second, demand must keep absorbing issuance, which the 1,291,415 BTC held in US spot ETFs supports as of 20 October 2026. Third, security must stay funded as the subsidy halves, with fees at only 0.59% of miner revenue in the 144 blocks to 4 November 2026. The thesis does not rule out drawdowns, since Bitcoin stood 37.95% below its high on 4 November 2026 (CoinPaprika API, 2026-11-04). It breaks if the cap changes, ETF holders sell sustained amounts, or hashrate falls as mining stops paying.

The Ethereum bet

The Ethereum thesis depends on ETH being required to use a platform that keeps growing. Activity must settle on Ethereum or its layer 2 networks, and that activity must create demand for ETH through fees, collateral or staking. The annualized burn of about 37,100 ETH shows fee demand is currently weak, so the thesis leans on collateral and staking, where 36.2% of supply is locked. Net supply growth of 0.83% over the past year means holders who do not stake absorb mild dilution, while stakers earn it. It breaks if users and assets move to rival chains such as Solana, which held $5.4 billion of DeFi value against Ethereum's $44.3 billion on 4 November 2026. It also breaks if value stays on layer 2 networks without reaching ETH.

Risks both share

Both bets share exposure to regulation, to ETF flows and to correlation. With a 0.96 weekly correlation over the last 52 weeks, holding both diversifies little. Regulatory treatment of staking, custody and ETF products can change demand quickly. ETF flows can also reverse: US spot Ether funds lost about $1.61 billion in October 2026, by SoSoValue's count. Drawdowns of 83% and 94% are part of the record (own calculation from Yahoo Finance closes), so any position needs a loss tolerance chosen before purchase. Neither thesis is proven, and both can be tested against the conditions in the table.

Data current as of November 2026.

Conditions can break through technical change as well as demand, so the upgrade path matters.

How Do Upgrades Reach Each Network, and What Is Next?

Bitcoin changes rarely and by rough consensus, while Ethereum ships scheduled hard forks. The Glamsterdam upgrade reached the Sepolia testnet in October 2026, but its next test activation was postponed and no mainnet date has been set. Each network protects a different property: Bitcoin guards its monetary rules, and Ethereum keeps its platform improving.

How Bitcoin changes

Bitcoin upgrades are soft forks that node operators and miners must accept, and no body can force one. Taproot, activated on 14 November 2021, remains the latest consensus upgrade. In 2026 the BIP-110 proposal sought a one-year consensus limit on the size of data fields in transactions (BIP-110, 2026). Its mandatory-signalling window of 8 to 23 August 2026 drew 0 of 2,016 signalling blocks. The nodes enforcing it split onto a branch that stalled (bitcoin/bips #2245, 2026). Bitcoin Core 30, released on 10 October 2025, raised the default data-carrier limit to 100,000 bytes. That is a policy setting nodes can reverse, not a consensus rule (Bitcoin Core release notes, 2025). The slow path is the design: it protects the monetary rules but delays new features.

How Ethereum changes

Ethereum coordinates upgrades through public developer calls and scheduled hard forks. It has shipped Shapella (12 April 2023), Dencun (13 March 2024) and Pectra (7 May 2025) in recent years. Fusaka went live on 3 December 2025 with PeerDAS. Blob capacity then rose from a target of 6 to 10 on 9 December 2025 and 14 on 7 January 2026 (Ethereum Foundation, 2025). Glamsterdam activated on the Sepolia testnet on 6 October 2026. Its Hoodi testnet activation, set for 26 October, was postponed on 22 October so developers could investigate how EIP-8037, which reprices state-creation gas, interacts with existing mainnet contracts, and no new Hoodi or mainnet date has been set (Ethereum Foundation, 2026). On the core developers call that day, a December 2026 mainnet date was described as highly unlikely (EtherWorld, 2026). Its headline changes are enshrined proposer-builder separation (EIP-7732) and block-level access lists (EIP-7928).

FAQ

?Is Ethereum the same thing as ether, and what is ETH?

Ethereum is the network, and ether is its native coin, written ETH. People often say "Ethereum" for both. ETH pays transaction fees, measured in gas, and serves as the collateral validators lock to secure the chain. Bitcoin follows the same split: Bitcoin is the network and bitcoin (BTC) is the unit.

?Can bitcoin be staked or used in DeFi the way ETH can?

Bitcoin has no native staking because it uses proof of work (Bitcoin.org, 2008), so any yield on BTC comes from lending, wrapped tokens or other layers that add counterparty and smart contract risk. DefiLlama counted $4.2 billion locked in protocols on Bitcoin on 4 November 2026, against $44.3 billion on Ethereum.

?What is the flippening, and how far is ETH from overtaking BTC?

The flippening means Ethereum's market capitalization overtaking Bitcoin's. On 4 November 2026 Ethereum's cap of $283.1 billion was 18.0% of Bitcoin's $1.574 trillion, so Bitcoin was about 5.6 times larger. Ethereum held 10.3% of the crypto market against Bitcoin's 57.2%. The gap describes the present and carries no forecast.

?How does Ethereum compare with other smart contract chains such as Solana?

Solana ranked third by DeFi value locked at $5.4 billion on 4 November 2026, behind Base at $6.0 billion and far behind Ethereum's $44.3 billion. Solana held $14.5 billion in stablecoins against $137.0 billion on Ethereum. These DefiLlama figures measure current usage, not technical quality, since chains differ in design, cost and security.

?What happens to ETH issuance if more ETH is staked?

Issuance rises with the square root of total staked ETH, so doubling the staked amount raises yearly issuance by about 41%, not 100%. Each staker's reward rate falls as the staked total grows. At 44,246,327 ETH staked on 4 November 2026, 36.2% of supply, issuance runs at about 1.09 million ETH a year.

?Which exchange-traded products exist for each coin?

US spot products exist for both. Fourteen Bitcoin funds held 1,291,415 BTC on 20 October 2026. Eleven Ether funds trade, nine since 23 July 2024, with sponsor fees from 0.14% to 2.50%, and six stake part of their ETH. A fund holds the coin on the investor's behalf, which removes self-custody but adds an annual fee and market-hours trading.

?Where can I check these numbers myself for free?

CoinPaprika publishes prices, market caps and all-time highs. Ultrasound.money shows ETH supply, issuance, burn and staked ETH. DefiLlama covers DeFi value locked and stablecoins by chain, and mempool.space shows Bitcoin hashrate and fees. Yahoo Finance offers daily price history for both coins. Free tiers are rate-limited, so check dates against the figures above.

References / Sources