Are you talking about coinmarketcap? 

Do not just go with ratings. Most of it are biased. They will take a coin to rank one if the payment is good.
Specially now, who will pay for bitcoin? While XRP  have someone in its back to pay for advertising their coin.

Just do your research and look at the usage of every coin. If it is ranking I still prefer ETH rather than XRP and of course BTC at my top list.