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What is Cryptocurrency?

Disclosure: Crypto is a high-risk asset class. This article is provided for informational purposes and does not constitute investment advice. By using this website, you agree to our terms and conditions. We may utilise affiliate links within our content, and receive commission. You can read more about our editorial policy here. Cryptocurrency is a digital asset that functions as money, represents value, or performs a utility function on a blockchain. In this guide, we’ll explore the question, “What is cryptocurrency?” We’ll also discuss blockchains, how cryptocurrencies work, cryptocurrency exchanges, and how to use cryptocurrency. Let’s get started with some background first.

2026-07-17

What Is a 51% Attack? Meaning, Cost, and Examples

A 51% attack happens when a single person or group controls over half of a blockchain network’s computing power. With this level of control, they can block transactions, reverse them, and even double-spend coins. It represents a big threat to the security and trust of decentralized systems. While larger networks like Bitcoin and Ethereum are better protected due to widespread mining power, smaller blockchains with fewer participants face a greater risk. Key Takeaways Both Proof-of-Work (PoW) and Proof-of-Stake (PoS) blockchains can be vulnerable to 51% attacks, but the attack method differs for each system. Successful 51% attacks enable attackers to reverse transactions and double-spend coins, which can damage trust in the network. The cost of a 51% attack varies widely; it’s generally too expensive on large networks but feasible on smaller or newer blockchains. Preventing 51% attacks often involves enhancing network decentralization, security protocols, and community participation. Real-world examples like the Bitcoin Gold and Ethereum Classic attacks illustrate the potential consequences for crypto prices and security.

2026-07-14

What Is a 51% Attack? Meaning, Cost, and Examples

Is Bitcoin Unethical? A Clear Way to Judge It

Is Bitcoin unethical? There is no single answer. The case turns on energy use, financial freedom, crime risk, and how people actually use it.

What Is Bitcoin SV? A Beginner's Guide to BSV

Bitcoin SV, or BSV, is a separate cryptocurrency that split from Bitcoin Cash. It is not the same asset as Bitcoin, or BTC.

Stablecoin vs Bitcoin: What’s the Difference?

Stablecoin vs Bitcoin comes down to purpose, supply, and risk: stablecoins aim for price stability, while Bitcoin is scarce and market-priced.

What Is Similar to Bitcoin? It Depends on the Comparison

Many things seem similar to Bitcoin, but the resemblance may be about technology, scarcity, payments, or market behavior—not all at once.

Who Runs Bitcoin? No One Runs It Alone

Who runs Bitcoin? No single company or founder controls it. Bitcoin operates through nodes, miners, developers, and users following shared rules.

Who Regulates Bitcoin?

Bitcoin has no single regulator. The network follows protocol rules, while exchanges, custody, AML, taxes, and fraud cases are handled by local authorities.