> ## Documentation Index
> Fetch the complete documentation index at: https://docs.theblockchainlibrary.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Ether

> Ether (ETH) is the native cryptocurrency of the Ethereum blockchain. It functions not only as a digital asset that acts as a store of value but also as the primary fuel that powers the network. ETH is required to pay for transaction fees, known as gas, and serves as a medium of e

# Ether

Ether (ETH) is the native cryptocurrency of the Ethereum blockchain. It functions not only as a digital asset that acts as a store of value but also as the primary fuel that powers the network. ETH is required to pay for transaction fees, known as gas, and serves as a medium of exchange for decentralized applications (dApps) built on Ethereum. Unlike Bitcoin, which primarily functions as digital gold, Ether is programmable money, deeply integrated into the operational logic of the Ethereum network’s smart contracts.

## Definition

Ether (ETH) is the native cryptocurrency of the Ethereum blockchain. It functions not only as a digital asset that acts as a store of value but also as the primary fuel that powers the network. ETH is required to pay for transaction fees, known as gas, and serves as a medium of exchange for decentralized applications (dApps) built on Ethereum. Unlike Bitcoin, which primarily functions as digital gold, Ether is programmable money, deeply integrated into the operational logic of the Ethereum network’s smart contracts.

## Simple explanation

Think of Ether like tokens you use at an arcade. You need these tokens to play the games, which in the digital world are apps like banks or marketplaces. Just like you can't play games without tokens, you can't run programs on Ethereum without Ether. It is the fuel that keeps the whole system moving.

## Why it matters

Ether is essential for the economic security and operation of the Ethereum network. Without it, the network would have no mechanism to prevent spam or prioritize transactions, making it the bedrock of the entire decentralized finance ecosystem.

## How it works

Ether is issued through the Ethereum protocol as a reward for validators who secure the network. When a user initiates a transaction or runs a smart contract, they must pay a fee in ETH to compensate the network for the computational resources used. This fee structure creates demand for the token and aligns the incentives of network participants with the health of the blockchain.

## Real-world example

A user interacting with the decentralized lending protocol Aave must pay transaction fees in ETH to deposit collateral or borrow assets.

## Advantages

* Programmable and flexible utility
* Deeply integrated with DeFi protocols
* Globally liquid digital asset

## Limitations

* Transaction fees can be expensive
* Price volatility can affect usage costs
* Regulatory uncertainty in various jurisdictions

## Common misconceptions

* People often mistake Ether as being the same thing as Ethereum, but Ethereum is the network while Ether is the currency.
* Many believe there is a hard cap on the supply of Ether, whereas the supply is actually dynamic based on issuance and burn rates.

## Related knowledge

* [DeFi](/categories/defi) — term
* [EIP-1559](/generated/v2/glossary/eip-1559) — term
* [Ethereum](/categories/ethereum) — term
* [Smart Contract](/generated/v2/glossary/smart-contract) — term
* [Transaction Fee](/generated/v2/glossary/transaction-fee) — term

***

**Canonical knowledge ID:** `glossary:ether`