WHAT IS CRYPTOCURRENCY?
Plain English
Cryptocurrency is digital money that lives on the internet — no banks, no governments, no middlemen. Bitcoin is the most famous one. You own it directly, like cash in your hand, except it's secured by math.
Going deeper
Cryptocurrency is a digital or virtual form of money that uses cryptography for security and operates on a decentralized network called a blockchain. Unlike traditional currencies issued by governments (fiat money), cryptocurrencies are typically not controlled by any central authority. The first and most well-known cryptocurrency, Bitcoin, was created in 2009 by an anonymous person (or group) known as Satoshi Nakamoto. Cryptocurrencies can be used for peer-to-peer transactions, storing value, powering applications, and more. They're called 'crypto' because cryptographic techniques secure every transaction.
Examples
Digital Cash
You want to send $50 to a friend in another country. With a bank, it takes 3-5 days and costs $25 in fees. With Bitcoin, you send it directly to their wallet address in minutes, with a small network fee — no bank needed.
Scarce Digital Asset
There will only ever be 21 million Bitcoin. Compare this to the US dollar, where the government can print more. Bitcoin's scarcity is written into code — no central authority can change it, which is why some call it 'digital gold'.