If you’ve spent a while using services like Coinbase to buy mainstream cryptocurrencies such as Bitcoin, Litecoin, and Ethereum, you might feel like it’s time to branch out. Perhaps you want to try your hand at trading, or maybe you’d just like to own some less well-known coins. In either case, you’ll need to sign up for a cryptocurrency exchange. There are a lot to choose from, but one of the most popular is Bitfinex.