for my favorite coins still bitcoin and ethereum, no one can replace them both. I think bitcoin and ethereum will still exist for a long time, and they will be even more valuable.
Bitcoin and Ethereum might not be going anywhere, but there are a lot better Dapp platforms being created with much better chances at scaling than ETH. Who knows though, it's a war out there!
Yes, I think each individual will mention a favorite coin based on the coins they have, including you. However, overall and the majority of people will recognize bitcoin and ethereum are good coins.