Since cryptocurrencies burst onto the scene they have exploded in popularity, with hundreds of millions invested and a whole slew of different coins, each with their own benefits and drawbacks. The last 12 months have been tough on most cryptocurrencies, but for some it has not been all bad news. If you’re interested in crypto, it can be hard to know which coins to pay attention to, and which ones will be a flash in the pan. So, we had a look at the top cryptocurrencies by market cap and how they have performed in the last 12 months.