Cryptocurrency
Cryptocurrency is a digital form of currency (money).
Cryptocurrency is like using tokens at an arcade. Imagine each token is a type of digital money, like Bitcoin. You buy these tokens with regular money, and then you can use them in the digital world, like playing games at an arcade. Just like arcade tokens, cryptocurrencies can be traded or used for purchases, but only where they're accepted.
Their value can go up and down quickly, like the popularity of different arcade games. People buy cryptocurrency hoping the tokens will become more popular and increase in value, but it's risky, like betting on which arcade game will be the next big hit.