Great job! I like your website, it looks simple, but professional and your site name is easy to remember. For me is also important that site is mobile friendly.
Just few advices to you. If price of coin increased, I think that it should written in green symbols instead of blue.
And also, I don't is that possible or not, but if you can, please allow to users change position of coin. I think some users would like to see their favourite coins on the top of site, and coins which they are not interested in - on the bottom.