Is Ethereum going to die in my opinion is impossible and I think it is beyond everyone's thinking, Ethereum has a large market cap and many people hold this coin and the most popular coin after bitcoin.
Well, you can't apply same logic to XRP, however it is the top 5 coin by market cap, but it is going to die sooner or later.
You can tell by comparing its 5-year chart with any other top 10 coin.