There are some cryptocurrencies that hope to replace bitcoin such as ethereum , ripple and more but I don't think any of them can replace bitcoin in the future.
you just named two of the worst coins that will never even come close to bitcoin let alone be able to replace it. there are at least a dozen other coins with good technology that have the potential to do that but you are blind to them because shitcoins like ETH are overly advertised and pumped.