I like Ethereum and am happy I have some.
Other than a pure Bitcoin maximalist approach, it would seem hard to justify not having any in your blockfolio. It serves a real purpose and seems likely to last.
But the idea of Ethereum being "better" than Bitcoin is I think shortsighted.
As usual, it's worth listening to a talk from Andreas:
The main takeaway is that Bitcoin and Ethereum fundamentally do different things.
And that being designed to be better at one thing will come with the tradeoff of being worse at something else. And that therefore there is no "best", just like there's no "best" between a lion and a shark. They're just different.
Bitcoin's simplicity relative to Ethereum makes it actually better at what Bitcoin does, at being a secure decentralized p2p ledger. (Being simple is the best way to accomplish this.)
Ethereum is better at enabling smart contracts.
Flippening
If you think ETH will prove to be more valuable than BTC, then you have to think the arena that ETH is good at is more valuable to the world than the arena BTC is good at.
We're still in the infancy (or maybe the toddler phases) of price discovery, so nothing at all should be very surprising, and I'm unwilling to say that it's impossible ETH price would ever pass BTC price. It's already come close, so if it jockeyed ahead for a few weeks or something, that wouldn't be too different than what's already happened.
But longterm it won't be the default/reserve ledger.
Even if it's not bound to be Bitcoin that fills this roll, it's not going to be Ethereum. Ethereum is not built to serve this role. It would be something with characteristics that are better suited to be a secure ledger.
To me it seems like there are a lot of people in the crypto space these days who think Ethereum is "better" than Bitcoin or that it's only a matter of time before it becomes the #1 coin and that Bitcoin will soon be recognized to be outdated. But I'd suggest that these people don't really appreciate the bigger picture of why a p2p ledger is valuable.
More complex doesn't mean more valuable or better overall.
It's kind of like if you were going for a job interview, and you sacrificed smiling and combing your hair nicely in order to have a big vocabulary or a niche skill set on your resume. It might help you for certain jobs but hurt you for others.
Ethereum is more useful for certain things. As is Bitcoin. And the arena that Bitcoin is good at I think will prove to be much grander than the arena Ethereum is good at.