# What is Cryptocurrency?

Cryptocurrency can sound complicated, but the core idea is simple: **it's digital money that no single bank, government, or company controls.** Instead, it runs on a technology called the blockchain — a shared system that keeps everything honest and transparent.

## Digital money you control

When you use regular money, a bank keeps track of your balance and can freeze your account, charge fees, or restrict transfers. Cryptocurrency is different: **you hold your own funds**, and transactions happen directly between people — no middleman required.

This means:

* Markets are open **24/7** — there's no "closing time"
* Anyone in the world can participate, regardless of where they live or whether they have a bank account
* You are in full control of your money

## What is a blockchain?

A **blockchain** is the technology that makes cryptocurrency possible. Think of it like a shared Google Sheet that records every transaction ever made — but with one big difference: **nobody can edit or delete past entries.** Every transaction is verified by thousands of computers around the world, so cheating the system would require overpowering all of them at once. That's what makes it trustworthy.

Each "block" in the chain contains a batch of transactions. Once a block is added, it's permanent — this is what people mean when they say blockchain transactions are "immutable."

## Bitcoin and altcoins

**Bitcoin (BTC)** was the first cryptocurrency, created in 2009. It's the most well-known and is often compared to "digital gold" — a store of value that people hold rather than spend daily.

**Altcoins** are all other cryptocurrencies besides Bitcoin. There are thousands of them, each designed for different purposes. Some, like **Ethereum (ETH)**, power smart contract platforms. Others, like **Solana (SOL)**, focus on speed and low transaction costs.

## What are tokens?

A **token** is a digital asset that lives on a blockchain. Think of tokens like arcade tokens — they work within a specific platform or ecosystem and can represent different things:

* **Currency tokens** — used for payments and value transfer (e.g., ETH, SOL)
* **Stablecoins** — tokens pegged to a stable value, like the US dollar (e.g., USDC is always worth $1)
* **Governance tokens** — give holders a vote in how a protocol is run (e.g., GMAC is Gemach's governance token)
* **Memecoins** — community-driven tokens, often humorous in branding, that can be highly volatile

## Tokens you'll encounter on GDex Pro

| Token    | What it is                                                                  |
| -------- | --------------------------------------------------------------------------- |
| **SOL**  | Solana's native token — used for transactions on the Solana network         |
| **ETH**  | Ethereum's native token — the backbone of the Ethereum ecosystem            |
| **BNB**  | BNB Chain's native token — powers the Binance ecosystem                     |
| **USDC** | A stablecoin — always worth $1, useful for holding value without volatility |
| **GMAC** | Gemach DAO's governance token — unlocks premium features on GDex Pro        |

## Why does cryptocurrency matter?

Cryptocurrency gives individuals access to financial tools that were previously only available through banks and financial institutions. With DeFi (decentralized finance), you can:

* Trade any token for any other token, instantly
* Earn interest on your holdings
* Borrow against your crypto without a credit check
* Send money anywhere in the world in seconds, for minimal fees

{% hint style="info" %}
**You don't need to understand all the technical details to start trading.** GDex Pro handles the complex parts for you — the blockchain interactions, the routing, and the security. You just decide what you want to do.
{% endhint %}

## Next step

Now that you know what cryptocurrency is, let's learn how you actually **hold and manage** it. Continue to [👛 What is a Crypto Wallet?](https://docs.gemach.io/gemach-dao/getting-started/getting-started/what-is-a-wallet)