Ethereum, being the world's second largest cryptocurrency by market cap, has all the potential of replacing Bitcoin in the future. It's more than just a cryptocurrency, being a platform for the development and execution of smart contracts (aka dApps). With ETH, it's possible to launch alternative cryptocurrencies without the need to start a Blockchain from scratch. It's also possible to use the ETH blockchain for other purposes such as voting, proof of identity, verification of documents, and more. In contrast, Bitcoin's only use is for finance where it cannot be implemented in other areas by its own.
Given all of the benefits Ethereum provides on top of Bitcoin, it makes me wonder whenever it'll be able to replace the pioneer cryptocurrency within the future? As long as, Ethereum keeps progressing in development and mainstream acceptance, it'll be much closer to Bitcoin every step of the way. What are your thoughts?

You are Right, Ethereum is more than just a cryptocurrency. Out of top 100 projects in market is running on Ethereum Blockchain by using its smart contract. So it is well clrear that Eth is not going anywhere and it is also no doubt about be the 2nd largest project in cryptocurrecny after the BITCOIN.
But here is one thing very obvious that not can be compeat Bitcoin Ever because Bitcoin is the base of crypto, People will never lose interest into bitcoin. No doubt other ALT coins have well utility, have more Transaction speed instead of bitcoin but despite all these fact no one can replace bitcoin or will it left behind.
One more question could be raise here. Can BNB Overtake ETH?