Bitcoin vs. Ethereum: what's the difference

Bitcoin and Ethereum are the two largest cryptocurrencies by market cap, but they solve different problems. Bitcoin was created as digital money — an alternative to the banking system. Ethereum was created as a programmable platform for building applications, with its own coin, ETH, serving as fuel for that platform rather than the end goal itself.

Key Differences

• Purpose — Bitcoin is primarily a store of value and payment method, Ethereum is a platform for smart contracts and decentralized applications (DeFi, NFTs, DAOs)
• Supply — Bitcoin has a hard-capped supply of 21 million coins, Ethereum has no formal supply cap
• Consensus mechanism — Bitcoin runs on Proof-of-Work (mining), Ethereum moved to Proof-of-Stake (staking) in 2022
• Speed and functionality — Bitcoin's network is deliberately simple and conservative, while Ethereum supports complex smart-contract logic, which enables more use cases but also more potential vulnerabilities
• Development philosophy — changes to the Bitcoin protocol move very slowly and conservatively, while Ethereum ships updates far more frequently and aggressively

What This Means in Practice

There's no universal answer to "which is better," because the two coins solve different problems: Bitcoin is more often treated as digital gold — an asset for preserving value — while Ethereum functions as the infrastructure much of the rest of the crypto economy is built on, from stablecoins to DeFi protocols. Many investors and traders hold both precisely because they play different roles, not because they compete head-to-head.