That's certainly true, mate. Bitcoin is great for finance, due to its unmatched security against 51% attacks. Ethereum has a lesser degree of security than Bitcoin, meaning that it's not meant to be used as a reliable cryptocurrency for digital payments. After all, Vitalik designed Ethereum to serve as a platform for the development and execution of smart contracts that are censorship-resistant. There are many other uses within the Ethereum blockchain, the same way there are within the Bitcoin blockchain. If we were to make a comparison between said cryptocurrencies and real-world assets, you'll notice that Ethereum is more like "Oil" while Bitcoin resembles "Gold" in every way. Without Ethereum, people cannot execute decentralized applications on its blockchain network as it's the "fuel" required to perform worldwide computations. On the other hand, without Bitcoin, people cannot enjoy financial freedom where they get to control their own money (instead of greedy banks).
In terms of technicalities, we cannot deny that Ethereum is far superior than Bitcoin in every way. But, Bitcoin will always be the #1 cryptocurrency of the world because it has established a trusted brand that many people are fond of. The first thing they come up when joining the world of crypto is Bitcoin, not Ethereum. Considering that altcoins rely on Bitcoin to survive, I'd say that it's nearly impossible for the pioneer cryptocurrency to be replaced anytime soon.
Nonetheless, I believe that Ethereum will continue to grow alongside Bitcoin for many years to come. It serves as a complement to the main Bitcoin blockchain, than a competitor. With Ethereum and hundreds of other existent blockchain networks, Bitcoin can enjoy reduced stress on the network due to decreasing transaction load. The world's second-largest cryptocurrency by market cap has great ambitions for scalability than Bitcoin itself. With increased adoption of ETH, people will also come into BTC, benefiting both networks for the foreseeable future. Just my opinion