This is what I think: Ethereum will survive and Ripple will die for sure. Why? Because Ripple is centralized. Just my opinion, though

That is right. People are here just for to make their wealth a decentralized asswets that is why they will not like to put their money in ripple. But only when they will see any rise in the price but still that will not be a permanent rise in the price. By the way in both of them if you want to invest for a long term then invest your money in ethereum. That will bring a huge profit for you in short time period. But when you see the price of bitcoin increasing then immediately convert your ethereum to Bitcoin as the ethereum then remain back.