What is Ethereum? Beyond Just Cryptocurrency

In this tutorial, you'll learn about What is Ethereum? Beyond Just Cryptocurrency. We cover key concepts, practical examples, and best practices to help you understand and apply this topic effectively.

What You'll Learn

Understand Ethereum's architecture — how it differs from Bitcoin, what makes it programmable, and how it powers the decentralized application ecosystem.

Why It Matters

Ethereum is the largest smart contract platform. Most DeFi, NFT, and Web3 applications run on it. Understanding Ethereum is essential for any Blockchain developer.

Real-World Use

Launching a cryptocurrency token, building a decentralized exchange, minting an NFT collection, or creating a DAO.

Bitcoin vs Ethereum

The Ethereum Virtual Machine (EVM)

The EVM is a global, decentralized computer that executes smart contracts. Every node runs the EVM, ensuring everyone gets the same result.

Think of it as a single computer that:

• Runs everywhere (every node)
• Never goes down
• Can't be censored
• Executes code deterministically

Ether (ETH)

ETH is the native cryptocurrency of Ethereum. It serves two purposes:

1. Gas — Pay for computation on the network
2. Value — Transfer wealth, collateralize loans, pay for NFTs

Accounts

Ethereum has two types of accounts:

Externally Owned Account (EOA)

• Controlled by a private key
• Can initiate transactions
• What humans use

Address: 0x742d35Cc6634C0532925a3b844Bc9e7595f2bD18
Balance: 5.2 ETH
Nonce: 42

Contract Account

• Controlled by code (smart contract)
• Can only react to transactions from EOAs
• Has its own ETH balance

Address: 0x... (determined at deployment)
Balance: 100 ETH
Code: (Solidity bytecode)
Storage: (contract state)

Gas and Fees

Every operation has a gas cost:

Transaction fee = gas_used × gas_price (in gwei)
1 gwei = 0.000000001 ETH

The Merge

In 2022, Ethereum switched from Proof of Work to Proof of Stake, reducing energy consumption by 99.95%.