Ethereum is indeed very worthy of being the King of Altcoin. But now Ethereum is doubtful because of a rating downgrade. And XRP is now ranked second, of course, this will make XRP increase in volume.
Though the price is now lower, ethereum still is the king because it supports mostly of the platforms. Even more altcoin comes on the market, nothing can beat it because its function is unique. Ripple cannot stay longer on the position becausw there is no other next to bitcoin aside from ethereum.