The background seems too bright for me. Sites like this, we are abundant of it and it's okay to see more of them so that people would have a different option to visit not just CMC or coingecko. But for you to be able to get more visitors, look at them and see what they still lack of.
Unlike them, they have listed thousands of altcoins even the coins that are near to its death. By the way, keep it up and keep on improving.
I wanted to add a little bit of constructive - you can check other popular sites like this forum or reddit or damn facebook: all of them have some sort of grey-ish background which may lead you to some thoughts.
Also I'd suggest to work on scalability of the site, because at my 23" monitor there is plenty of blank space. So I assume you can stretch spreadsheet a bit more.