What is Ethereum and How Does It Work?

If you have spent any time looking into cryptocurrency, you have probably heard of Ethereum. It is the second-largest crypto by market cap, right behind Bitcoin. But Ethereum is not just another digital currency. It is a platform that changed what blockchains can actually do.

This guide breaks down what Ethereum is, how it works under the hood, and why it matters for anyone interested in crypto trading or blockchain technology.

What is Ethereum?

Ethereum is an open-source, decentralized blockchain platform that lets developers build and run applications without relying on a central authority. It was proposed in 2013 by programmer Vitalik Buterin and launched in July 2015.

The easiest way to think about it: Bitcoin is digital money. Ethereum is a digital platform that happens to have its own money (called ETH or Ether). Bitcoin was designed to do one thing really well, which is to transfer value between people without a bank in the middle. Ethereum took that idea further by asking a bigger question. What if a blockchain could run code, not just track payments?

That distinction is what makes Ethereum so significant. It is not just a ledger of transactions. It is a global computer that anyone can program on, and nobody can shut down.

How Ethereum works

At its core, Ethereum is a blockchain. That means it is a distributed network of computers (called nodes) that all maintain an identical copy of a shared database. When someone submits a transaction, the network validates it and adds it to the chain. No single company or government controls it.

Here is how the key pieces fit together:

• The Ethereum Virtual Machine (EVM): This is the runtime environment that executes code on the Ethereum network. Every node runs the EVM, which means every node processes the same computations and reaches the same result. It is what makes Ethereum programmable.
• Proof of Stake (PoS): Since September 2022 (an upgrade known as "The Merge"), Ethereum uses Proof of Stake to secure the network. Validators lock up (stake) 32 ETH as collateral and take turns proposing and verifying new blocks. If they act honestly, they earn rewards. If they try to cheat, they lose their staked ETH. This replaced the old Proof of Work system, cutting energy consumption by over 99%.
• Gas fees: Every operation on Ethereum costs "gas," which is a small fee paid in ETH. Gas compensates validators for processing your transaction. Simple transfers cost less gas. Complex operations (like interacting with a smart contract) cost more. When the network is congested, gas prices go up because users compete for limited block space.

The gas fee system is important to understand as a trader. If you are moving ETH or interacting with decentralized apps, the fees you pay depend on network demand at that moment. During peak activity, fees can spike significantly.

What are smart contracts?

Smart contracts are the feature that sets Ethereum apart from Bitcoin and most other blockchains. A smart contract is a program stored on the blockchain that runs automatically when predefined conditions are met. No middleman required.

Think of a vending machine. You put in $2, press the button for a soda, and the machine gives you the soda. There is no cashier involved. The rules are built into the machine itself. Smart contracts work the same way, except the "machine" lives on a global network that nobody owns.

Some real-world examples of what smart contracts power:

• Decentralized finance (DeFi): Lending, borrowing, and trading without banks. Protocols like Aave and Uniswap use smart contracts to match lenders with borrowers and swap tokens, all automatically.
• NFTs (non-fungible tokens): Digital ownership of art, music, collectibles, and more. Each NFT is a smart contract that proves who owns a specific asset.
• DAOs (decentralized autonomous organizations): Groups that are governed by code instead of a board of directors. Members vote on proposals, and the smart contract executes the outcome automatically.
• Supply chain tracking: Companies use smart contracts to record every step a product takes from factory to store shelf, creating a tamper-proof audit trail.

Once a smart contract is deployed to Ethereum, it cannot be changed. This is both a strength and a risk. The strength is that users can trust the code will execute exactly as written. The risk is that bugs in the code are permanent, which is why smart contract auditing is a growing industry.

ETH as a cryptocurrency

Ether (ETH) is the native currency of the Ethereum network. It serves two main purposes: paying gas fees for transactions and acting as a tradeable asset on exchanges.

As of early 2026, ETH is the second-largest cryptocurrency by market capitalization. It consistently ranks behind only Bitcoin. For traders, ETH is one of the most liquid assets in the crypto market, meaning you can buy and sell large amounts without significantly moving the price.

A few things that make ETH interesting from a trading perspective:

• Staking yield: Since the move to Proof of Stake, ETH holders can stake their coins and earn annual rewards (typically 3-5% APY). This creates a passive income component that Bitcoin does not have.
• Deflationary pressure: An upgrade called EIP-1559 (August 2021) changed how gas fees work. A portion of every transaction fee is now "burned" (permanently destroyed). When network activity is high enough, more ETH gets burned than is issued as staking rewards, making ETH deflationary.
• Correlation with ecosystem growth: ETH tends to benefit when DeFi, NFTs, or layer-2 networks gain traction, because all of these use cases require ETH for gas. More activity on Ethereum generally means more demand for the token.

If you are new to trading, ETH is a solid coin to start with. It has deep liquidity, a long track record, and strong fundamental drivers. You can practice trading ETH risk-free using Staxo's crypto trading simulator with live market prices.

Ethereum vs Bitcoin

People often compare Ethereum and Bitcoin, but they were built for different purposes. Here is how they stack up:

• Purpose: Bitcoin is primarily a store of value and digital currency. Ethereum is a programmable platform for decentralized applications.
• Consensus mechanism: Bitcoin uses Proof of Work (miners solve complex math problems). Ethereum uses Proof of Stake (validators lock up ETH as collateral).
• Supply: Bitcoin has a hard cap of 21 million coins. Ethereum has no fixed supply cap, but the burn mechanism introduced by EIP-1559 can make it deflationary during periods of high usage.
• Transaction speed: Bitcoin processes roughly 7 transactions per second. Ethereum handles about 15-30 per second on its base layer, with layer-2 solutions (like Arbitrum and Optimism) pushing throughput much higher.
• Smart contracts: Bitcoin has very limited scripting capabilities. Ethereum was built from the ground up to support complex, programmable smart contracts.
• Energy use: Bitcoin mining consumes significant energy. Ethereum's switch to Proof of Stake reduced its energy consumption by roughly 99.95%.

Neither is "better" in absolute terms. They serve different roles in the crypto ecosystem. Many experienced traders hold both, using Bitcoin as a long-term store of value and Ethereum as exposure to the broader world of decentralized applications.

Understanding the differences between these two is a core part of building your crypto knowledge. Staxo's learning courses cover both Bitcoin and Ethereum fundamentals, along with dozens of other topics that help you trade with more confidence.

How to start trading ETH

If you want to trade Ethereum, the smartest first step is to practice without real money. Real exchanges charge real fees, and mistakes with real capital are expensive. A simulator lets you learn the mechanics, test strategies, and build confidence first.

Here is a simple path to get started:

• Learn the basics: Understand how Ethereum works (you are already doing that by reading this). Dig deeper with structured courses that cover blockchain technology, trading strategies, and risk management.
• Practice with virtual money: Staxo gives you $2,500 in virtual cash to trade 100+ real cryptocurrencies at live prices. Buy ETH, sell ETH, watch how it moves, and learn from every trade.
• Track your performance: Use the portfolio tracker to review your trades. Look at what worked and what did not. The goal is to develop a repeatable strategy, not to get lucky once.
• Move to real trading when ready: Once you have a strategy that consistently performs in the simulator, you can transition to a real exchange like Coinbase or Kraken with more confidence.

The biggest advantage of practicing first is that you learn to manage your emotions. Fear and greed drive most bad trading decisions. When there is no real money on the line, you can focus purely on learning the skill. That foundation pays for itself many times over when you eventually trade with real funds.

Whether you are curious about Ethereum as a technology or looking to add ETH to your trading portfolio, the best time to start learning is now. The crypto market does not wait for anyone, and the traders who put in the work early are the ones who are best prepared when opportunity shows up.