Bitcoin gets all the headlines when people talk about cryptocurrencies, but there are literally thousands of other options when it comes to these digital currencies. In fact, cryptos that aren’t Bitcoin are usually considered an “also ran” – what are called “altcoins,” or alternatives to Bitcoin. While Bitcoin may be the first major cryptocurrency to hit the market – it debuted in 2009 – many others have become highly popular, even if not quite as large as the original. Here are some of the largest cryptocurrencies by the total dollar value of the coins in existence, that is, their market capitalization.