If you’ve put off learning about digital currencies, now is the time to get up to speed because the cryptocurrency bubble keeps getting bigger. Bitcoin is almost a household name now, as it has been around for more than 10 years. The cryptocurrency was created in 2009 via a white paper written under the pseudonym Satoshi Nakamoto. It is open source and decentralized.

There are no transaction fees associated with Bitcoins, but there is also no government guarantee behind the currency.

You can’t hold a Bitcoin in your hand, but the currency can add value to your bank account. On April 29, 2021, one Bitcoin was worth $52,855.20.

There’s a finite number of Bitcoins–21 million–so it’s worth taking a look at the other cryptocurrencies on the market today. Take a look at five of the most popular in this free PDF download from TechRepublic.