W3Schools

Grow: Clueless about bitcoin? Here’s your cryptocurrency crash course

Cryptocurrencies are a bit like the Kardashians: You’ve probably heard of them, but you may not really be sure why. They’re completely overexposed in the media, but still somehow shrouded in mystery. To help you keep up with the cryptocurrencies, we’re answering some of the most-asked questions.

1. What’s a cryptocurrency, and what are the different types?

A cryptocurrency is exchanged in the digital world using cryptography, which is essentially a system of secret messages. In other words: There’s no physical coin or bill to put in your wallet—it’s all virtual. But cryptocurrencies do have a dollar value (and they can fluctuate wildly on a day-to-day basis).

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