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Different purposes
Bitcoin was built to do one thing well: be a scarce, decentralized form of digital money and a store of value. Ethereum was built to be a programmable platform, a kind of world computer where developers can run applications directly on the blockchain. Its coin, ether, is the fuel that pays for running those programs.
So Bitcoin aims for simplicity and security as money, while Ethereum aims for flexibility as a platform. That difference in goals drives almost every other difference between them.
Supply: capped vs flexible
Bitcoin has a fixed maximum of 21 million coins, and that cap is central to its identity. Ethereum has no fixed maximum. Its issuance can change, and a portion of ether is destroyed, or burned, with each transaction, which means its supply can rise or fall depending on activity.
In short, Bitcoin's monetary policy is fixed and predictable, while Ethereum's is more flexible and tied to how the network is used.
- Bitcoin: hard cap of 21 million coins
- Ethereum: no fixed cap, with some ether burned on each transaction
Technology: proof of work vs proof of stake
Bitcoin is secured by proof of work, the mining process where computers compete by spending energy. Ethereum originally used the same approach but switched in 2022 to proof of stake, where participants lock up ether to help secure the network instead of racing with hardware.
Proof of stake uses far less energy, which is one of the most discussed differences between the two networks today.
Fees and how each is used
On Ethereum, users pay fees, often called gas, to run transactions and applications, and the network hosts a wide ecosystem of apps for things like lending, trading, and digital collectibles. On Bitcoin, fees mainly pay to send the coin, and the network stays deliberately focused on being money.
This is why Ethereum is described as an ecosystem and Bitcoin as a settlement network for a single asset.
💡 One is money, one is a platform:Comparing them is a little like comparing a currency to an app platform that has its own currency. They overlap as investments but solve different problems.
What it means for a beginner
Both are volatile and carry real risk, and both can fall sharply. The useful takeaway is that they are not interchangeable: Bitcoin is closer to digital money, while Ethereum is closer to a platform for applications. Understanding that helps you read the news about each more clearly.
Which, if either, belongs in a portfolio is a personal decision and not something this guide recommends.
Frequently asked questions
What is the main difference between Bitcoin and Ethereum?
Bitcoin is designed to be digital money with a fixed supply, while Ethereum is a programmable platform for running applications, with ether as the fuel. Bitcoin optimizes for being money; Ethereum optimizes for flexibility.
Is Ethereum better than Bitcoin?
They have different goals, so neither is simply better. Bitcoin is more focused and has a fixed supply, while Ethereum is more flexible and supports a wide range of applications. Which suits you depends on what you value, and this is not advice.
Does Ethereum have a supply cap like Bitcoin?
No. Ethereum has no fixed maximum supply. Its issuance can change, and some ether is burned on each transaction, so the total supply can rise or fall with network activity. Bitcoin, by contrast, is capped at 21 million.
What is a smart contract?
A smart contract is self-executing code stored on a blockchain like Ethereum. It runs automatically when its conditions are met, which is what lets Ethereum host applications such as lending or trading without a central operator.
Related tools and pages
These are for learning. Any calculator here shows example scenarios, not predictions of future prices.
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