> For the complete documentation index, see [llms.txt](https://docs.bitfoot.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bitfoot.com/new-to-crypto/what-is-cryptocurrency.md).

# What is Cryptocurrency?

**Cryptocurrency** is a type of digital money that only exists online. Unlike regular money (like dollars or euros) that governments issue, cryptocurrencies are decentralized and run on a technology called **blockchain**.

Think of the blockchain as a public, digital database that records every transaction made with a cryptocurrency. This database is shared across many computers worldwide, so no single person or organization controls it. This decentralization makes it secure and nearly impossible to fake or double-spend coins.

The most popular cryptocurrencies are **Bitcoin** (BTC),  **Ethereum** (ETH) and **Solana** (SOL) but there are thousands of others, each with its own purpose and community.

Cryptocurrencies can be:

* **Traded** for profit
* **Used** to buy some goods and services
* **Sent** to others as digital payments
* **Used for specific utilities.** Some cryptocurrencies offer perks like revenue-sharing, access to exclusive products or services, or other benefits within a certain ecosystem.

**Why are people interested in crypto?**

1. **Privacy and Control**: With crypto, you control your own funds, without needing a bank.
2. **Investment**: People buy crypto as a way to invest, hoping its value will increase over time.
3. **New Technology**: Blockchain tech offers new ways to handle money and digital assets, sparking innovation in finance and beyond.