Bitcoin vs Ethereum: Side by Side Comparison

Bitcoin and Ethereum are the two coins everyone compares first, and for good reason: between them they account for the bulk of the entire crypto market cap, and almost every other project sits somewhere on a spectrum defined by these two. The live comparison above pulls fresh price, market cap, supply, and 7 day momentum data so you can see where they stand right now. The rest of this page is the context the numbers do not tell you.

What Each One Is Trying to Be

Bitcoin and Ethereum are not competing for the same job. Treating them as two flavours of the same product is the single most common analytical mistake in crypto and it leads to bad conclusions in both directions.

Bitcoin’s purpose has been the same since 2009. It is a fixed supply, peer to peer monetary network. The protocol does as little as possible on purpose. Blocks are small, scripts are limited, the issuance schedule is set in stone, and anything that adds attack surface is rejected by default. The bet is that by being deliberately minimal and conservative, Bitcoin becomes the credibly neutral base layer the world settles on for value. Its competitors are gold, treasury bills, and the global dollar system, not other cryptocurrencies.

Ethereum’s purpose is the opposite. It is a programmable platform on which anyone can deploy a contract that runs exactly as written. The Ethereum Virtual Machine is general purpose, the protocol upgrades regularly, and the supply policy is designed to flex with usage rather than be locked at a fixed number. The bet is that as more financial activity moves onchain, the chain that hosts it becomes valuable in proportion. Ethereum’s competitors are Solana, Avalanche, BNB Chain, and the broader smart contract platform set.

If you understand that gap, the rest of the comparison makes sense.

Supply and Issuance

The supply schedules are the cleanest illustration of how different the two coins really are.

Bitcoin issues new coins to miners on a schedule that halves roughly every four years. The first block paid 50 BTC. By 2024 it paid 3.125 BTC. Eventually the subsidy goes to zero and miners are paid only in transaction fees. Total supply is capped at 21 million and the last coin will be mined around the year 2140. This certainty is the foundation of Bitcoin’s monetary thesis: nobody can dilute you, because nobody can print more.

Ethereum has no max supply. Issuance is paid to validators who stake ETH, and the base fee of every transaction is burned via EIP-1559. When network usage is high enough that burned fees exceed validator rewards, ETH becomes net deflationary. When usage is low, it inflates slightly. This is intentional. Ethereum’s designers wanted issuance to track demand for blockspace rather than a fixed schedule, on the theory that a programmable settlement layer should have a money supply that responds to its own economy.

Neither approach is “better” in the abstract. Bitcoin’s fixed cap is a feature for store of value. Ethereum’s elastic supply is a feature for productive collateral. Comparing them on the same row of the table is necessary but not sufficient.

Market Position

In the comparison above you’ll see the live market cap split. Bitcoin has held the top spot since 2010 and its dominance (its share of total crypto market cap) typically sits between 40 and 60 percent. Ethereum is the durable number two and tends to take 15 to 25 percent. Together they routinely account for two thirds or more of the entire market.

That dominance gap matters for two reasons. First, liquidity. Bitcoin is the deepest liquidity pool in crypto by a wide margin, which makes it easier to move large amounts in and out without slippage and is one of the reasons institutions prefer it. Second, beta. Most other coins move in correlation with Ethereum more than Bitcoin, because most other coins are smart contract platforms or apps that compete with Ethereum in some way. In a risk-on rally, Ethereum tends to lead the altcoin sector. In a flight to safety, Bitcoin holds up better.

Fees, Throughput, and the Layer Two Reality

A fair fee comparison in 2025 has to include layer two networks. Comparing Bitcoin base layer fees to Ethereum base layer fees and stopping there gives you a misleading picture of what either network actually costs to use.

On Bitcoin base layer, a typical transaction costs anywhere from a few cents to a few dollars depending on mempool congestion. The Lightning Network handles payments off chain with near zero fees and instant settlement, but it requires channel management and is most useful for repeated, smaller payments rather than one off large transfers.

On Ethereum base layer, fees swing more dramatically. A simple transfer might cost a few dollars in calm periods and well over 50 dollars during peak DeFi activity. Most actual usage in 2025 happens on rollups like Arbitrum, Base, and Optimism, where the same transaction costs cents because the rollup batches thousands of transactions and posts a compressed proof to Ethereum. The base layer is increasingly settlement infrastructure rather than the place where end users live.

Volatility and Drawdowns

Both coins are volatile by traditional asset standards, but the shape of their volatility differs in ways that matter for portfolio sizing. Bitcoin tends to lead drawdowns and recoveries: it bottoms first in bear markets and tops first in bull markets. Ethereum amplifies the move once it gets going, both up and down, because it is more closely linked to risk appetite for the rest of the crypto economy.

Look at the 24 hour, 7 day, and 30 day rows in the comparison above to see what the current relationship looks like. If both are green and Ethereum is up more than Bitcoin, you are usually in a risk on phase. If Bitcoin is green and Ethereum is flat or red, the move is defensive: capital is moving into the safer crypto asset rather than chasing returns.

Who Should Hold What

There is no portfolio rule that fits every reader, but a few patterns are useful as starting points.

If your goal is the smallest possible exposure to a single asset that captures most of crypto’s upside, Bitcoin alone is the conservative choice. It has the longest track record, the deepest liquidity, the cleanest supply policy, and the institutional infrastructure (spot ETFs, custody, regulation) that the rest of the market is still building.

If your goal is exposure to onchain activity (DeFi, stablecoins, tokenisation, NFTs) and you believe that activity grows faster than the price of digital gold, Ethereum is the more direct bet. You’re effectively buying the gas of a settlement layer whose value scales with usage.

Most longer term holders end up with both, in some ratio that reflects how much they value certainty (Bitcoin) versus how much they value participation in the broader onchain economy (Ethereum). The comparison above will not pick the ratio for you, but it will show you exactly where each one stands today.

Where to Next

If you’ve worked through the numbers and want a deeper read on either coin individually, head to the Bitcoin coin page or the Ethereum coin page for full historical detail. To see how they sit relative to the rest of the top 10 you can use the market overview, and for a sentiment read across the whole space the crypto fear and greed index is one click away.