You have a long way to go until you reach your goal "Simple and powerfull website."
I liked the name of the site and the interface overall.

• The information looks very scarce (only 4 cryptocurrencies)
• There are no charts.
• The data update is not instantaneous,
• you insert coins and tokens in the same list (you also add ripple and forget to add ETH or litecoin)

Try adding more charts, currencies or at least exchange sites