Learn Crypto

Structured education across every format and skill level · 382 guides

📝Article

Web3

3 min read

What Is a Testnet in Crypto?

A testnet is a practice copy of a blockchain where coins are free and worthless. What testnets are for, how to use one, and why testnet coins are never sold.

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📝Article

Web3

3 min read

What Is a Mainnet in Crypto?

A mainnet is the live version of a blockchain, where coins have real value and transactions are permanent. What mainnet means and what a mainnet launch is.

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📝Article

Web3

3 min read

What Does Open Source Mean in Crypto?

Open source in crypto means the code is published for anyone to read and check. Why Bitcoin and Ethereum work that way, and why open does not mean safe.

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📝Article

DeFi

4 min read

What Is a Blockchain Oracle?

A blockchain oracle feeds outside data to smart contracts. Why a blockchain cannot look up a price on its own, and how Chainlink fills the gap.

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📝Article

Web3

3 min read

What Is a Node in Crypto?

A node is a computer that keeps its own copy of a blockchain and checks every transaction. What nodes do, why the copies matter, and how to run one.

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📝Article

Web3

4 min read

What Is Ethereum? The Blockchain That Runs Programs

Ethereum explained simply: the blockchain that runs programs, what ether and gas are, and why apps like Uniswap and Aave are built on it.

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📝Article

Web3

4 min read

What Is a dApp? Decentralized Apps Explained

A dApp is an app whose back end is a smart contract instead of a company server. How you connect a wallet, real examples, and what to watch for.

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📝Article

Web3

4 min read

What Is a Smart Contract? Code That Runs Itself

A smart contract is a small program on a blockchain that runs by itself. How it works, where Uniswap and Aave use one, and what can go wrong.

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📝Article

Trading

3 min read

What Is a Limit Order in Crypto?

A limit order sets the worst price you will accept. How it waits in the order book, why it may never fill, and when to use one.

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📝Article

Trading

3 min read

What Is a Market Order in Crypto?

A market order buys or sells right now at whatever price is available. How it fills, what slippage costs you, and when it is the right choice.

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📝Article

Trading

3 min read

What Is DCA in Crypto? Dollar-Cost Averaging Explained

DCA explained simply: what dollar-cost averaging is, how buying a fixed amount on a schedule works, and where the habit falls short.

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📝Article

Trading

3 min read

What Is ROI in Crypto?

ROI in crypto explained: the simple formula, how fees change the answer, and why a big percentage can still be a small amount of money.

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