What is Crypto currency?
Simply put, Cryptocurrency is a special kind of money that only exists on the internet. Unlike regular money, like dollars or coins, you can’t hold it in your hand. Instead, it’s digital and stored on computers all over the world. People use cryptocurrency to buy things, send money, or even invest, hoping its value will grow over time.
How Does Cryptocurrency Work?
Cryptocurrency works using a super-smart technology called blockchain. Imagine a giant digital notebook that keeps track of every transaction. This notebook is shared by millions of computers, making it nearly impossible to cheat or fake money. In essence, blockchain technology operates as distributed ledgers.
Another way to look at it is to imagine a group of friends keeping track of who owes who money. Instead of one person writing everything in a single notebook, each friend keeps their own copy of the same notebook. Every time a new transaction happens, all copies are updated at the same time. This way, no one can cheat or change the records without everyone noticing!
Instead of being controlled by a bank or government, crypto is decentralized, meaning no one person or company owns it. This makes it different from regular money, which is managed by banks and governments.

Examples of Popular Cryptocurrencies
There are thousands of cryptocurrencies, but some of the most well-known ones are:
Bitcoin (BTC)
The first and most famous cryptocurrency. It’s often called “digital gold.” It was created in 2009 by an unknown person or group using the name Satoshi Nakamoto. People use Bitcoin for online payments, as a store of value, or as an investment. Since its supply is limited to 21 million coins, many believe its value will increase over time and has done so.
Altcoins
Altcoins are any cryptocurrencies other than Bitcoin, offering different features and uses. Some are designed for faster transactions, smart contracts, or improved privacy.
- Ethereum (ETH) is the most well-known altcoin, allowing developers to create apps and smart contracts on its blockchain.
- Binance Coin (BNB) is used for trading discounts and fees on the Binance exchange, while Solana (SOL) is known for its speed and low transaction costs.
- Cardano (ADA) focuses on security, scalability, and sustainability, using a unique proof-of-stake system.
- XRP (Ripple) is designed for fast and cheap cross-border payments.
- Dogecoin (DOGE) is a cryptocurrency created in 2013 as a joke featuring a Shiba Inu dog meme, which unexpectedly grew into a popular digital currency with a vibrant community and a market value that has reached tens of billions of dollars. See our section on memecoins.
Stablecoins
Unlike Bitcoin and altcoins, which can have big price swings, stablecoins provide a safer way to store value or make transactions in the crypto world. Some of the most popular stablecoins include Tether (USDT) and USD Coin (USDC), both pegged 1:1 with the US dollar, making them widely used for trading and payments.
DAI is another well-known stablecoin, but instead of being backed by cash, it is maintained through a system of smart contracts. Stablecoins help bridge the gap between traditional finance and crypto, offering stability in a volatile market.

Cryptocurrency Use & Safety
People like cryptocurrency for many reasons:
Fast Transactions – You can send money to anyone in the world in minutes.
Low Fees – Some cryptos have cheaper fees than banks or credit cards.
Privacy – Crypto lets you send money without sharing too much personal info.
Investment Opportunity – Some people buy crypto hoping its value will increase.
Cryptocurrency can be safe, but there are risks:
Prices go up and down quickly.
There are scammers who will try to trick people.
If you lose your password (private key), you could lose your money forever.
That’s why it’s important to learn how to keep your crypto safe – see our section on crypto safety.