Bitcoin and Ethereum are usually presented as rivals, first and second place in the same race. They are better understood as two different products that happen to share a technology.

The purpose is different, and everything follows from that

Bitcoin does one thing deliberately: it moves and stores value without anyone’s permission, with a fixed supply of 21 million and a deliberately limited feature set. Its conservatism is the product. Changes are rare and hard, which is a weakness for development and a strength for something meant to be predictable for decades.

Ethereum is a platform for programs. Smart contracts run on it, which is why DeFi, stablecoins and tokenised assets mostly live there. It changes substantially and on purpose — the shift to proof of stake rebuilt how the network is secured.

So the question “which is better” has no answer. “Which is better for holding a fixed-supply asset for ten years” and “which is better for running an application” have different ones.

Supply: a hard cap versus a managed one

Bitcoin’s issuance halves roughly every four years and stops entirely around 2140. You can calculate the supply on any future date today.

Ethereum has no maximum supply. Issuance pays validators, and a portion of transaction fees is burned, so net supply can rise or fall depending on network activity. This is a design choice rather than an oversight, but it does mean the scarcity argument for Bitcoin does not transfer to Ethereum. Anyone using “digital gold” for both is blurring the distinction.

The return histories are genuinely different

This is where the abstract comparison becomes concrete. Our returns page now covers both assets, and switching between them shows years where one badly beat the other:

  • 2017 — Ethereum returned roughly 9,000% against Bitcoin’s roughly 1,200%. Both extraordinary; not remotely the same.
  • 2019 — Bitcoin gained around 87% while Ethereum finished roughly flat. Anyone holding ETH for “the same exposure with more upside” had a difficult year.
  • 2021 — Ethereum returned around 398%, Bitcoin around 63%.
  • 2024 — Bitcoin gained around 120%, Ethereum around 46%.

Ethereum has generally been higher-beta: bigger up years and deeper down years, including a steeper 2018. Two observations follow. First, they are not interchangeable. Second, the leadership swaps often enough that picking the winner in advance is not obviously easier than picking any other trade.

Fees, speed and where each is used

Bitcoin transactions are relatively slow and their fees rise with congestion; it is not designed for high-frequency small payments, and layer-2 networks exist to address that. Ethereum’s gas fees vary enormously with demand, which is why most everyday activity has migrated to layer-2 networks that settle back to it.

In practice: Bitcoin is mostly held and moved in large amounts. Ethereum is mostly used — for swaps, lending, stablecoin transfers and applications. That difference shows up in the data on their coin pages, from volume patterns to how each responds to market stress.

How to decide

Skip the price comparison and answer three questions. Do you want the most conservative, most predictable crypto asset, or exposure to a platform’s growth? Are you comfortable with deeper drawdowns in exchange for higher potential upside? And do you intend to use anything on-chain, or only to hold?

Plenty of people hold both, in a deliberate ratio, and rebalance. That is a coherent position. Holding both because you cannot decide, in whatever proportion you happened to buy, is not the same thing.

Nothing here is financial advice. See our risk disclaimer.