Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions from 29 to 33.

Cryptocurrency is like digital money that exists only on the internet. It's not like the cash you can hold in your hand or the coins you can jingle in your pocket. Instead, it's stored in a digital wallet on your computer or smartphone.

The most famous cryptocurrency is called Bitcoin. It was created in 2009 by someone using the name Satoshi Nakamoto. Since then, lots of other cryptocurrencies have been made, like Ethereum, Ripple, and Litecoin. Each one works a bit differently and has its own special features.

What makes cryptocurrencies special is that they don't need a bank or government to control them. Instead, they use something called blockchain technology. This is like a big digital record book that keeps track of every transaction ever made with that cryptocurrency. It's super secure and almost impossible to fake.

People use cryptocurrencies for all kinds of things. Some buy them as an investment, hoping the value will go up over time. Others use them to buy things online or send money to friends and family around the world. Cryptocurrencies can be sent from one person to another quickly and cheaply, without needing a middleman like a bank.

But cryptocurrencies can also be risky. Their value can go up and down a lot, like a rollercoaster. And because they're digital, if you lose your digital wallet or forget your password, you could lose all your cryptocurrency forever.

In conclusion, cryptocurrencies are a new kind of money that's changing the way we think about finance. They're exciting, but they come with risks, so it's important to be careful when using them.

What would be the best title for the passage?