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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

Did Bitcoin’s Whitepaper Cite Bit Gold?

Bitcoin’s whitepaper did not directly cite Bit Gold, but Bit Gold is often discussed as part of the technical background behind Bitcoin.

When Is Bitcoin Vegas? How to Check the Right Event

If you want to know when Bitcoin Vegas is, first identify which event you mean, then verify the date on the organizer’s current event page.

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.

How a Bitcoin Transaction Actually Works

A bitcoin transaction is a signed transfer broadcast to the network, checked by nodes, mined into a block, and confirmed on the blockchain.

Is Bitcoin in Trouble? How to Judge the Risk

Is bitcoin in trouble? Not by default. Separate price stress from network health, miner incentives, and liquidity before calling it a real problem.

Is Bitcoin Trademarked? What the Name Can Mean

Bitcoin is not a single globally owned trademark. In practice, rights depend on country, class, and whether the term is used as a brand or as description.