Bitcoin is the biggest and undisputed crypto asset right now, but this is not guaranteed forever.
Ignoring a lot of interesting and potentially disruptive development in the altcoin space is short sighted.
I think this is the statement where some folks here take issue. I will try to address them in this reply.
1. Bitcoin may not last forever, it is not guaranteed, but the longer it stays alive, the longer it's predicted to live. For all intents and purposes, Bitcoin is going to outlast every one in this thread. None of us here will live to see the day the last bitcoin is mined in 2140. Forever is relative. Humans have been on this planet "forever". But really, maybe only a few million years? The sun is about 4 billion years old. From one lifetime perspective, a hundred years is effectively "forever". I know it is not. You know it is not. But if you actually live to be 100, then you've been around "forever."
If you want a real number, I predict Bitcoin will still be running 200 years from now.
2. Anything good that comes out of the altcoin space, if it's really good, will get included in bitcoin. If it's not good enough or unnecessary or might cause problems or might cause conflicts, it will get delayed or not included at all. They can keep doing it in their respective altcoins.
People are always complaining about buying coffee with bitcoin, that waiting 10 minutes for a confirmation and a transaction fee that costs more than the coffee, well, it's the wrong "value". Not on the base layer anyway. You're not getting in between the consumer and the merchant, that's what Apple/Android Pay is for. That's what visa and mastercard and debit is for. You tap a piece of plastic on some terminal and they don't ask for a physical signature anymore for anything under $100, including your coffee.
You want finality of settlement in an hour, or a certified check/bank draft/money order that clears in an hour, to move $100 million dollars with a $5 fee across international borders "instantly" and verified and audited automatically every ten minutes by more than ten thousand computers in all jurisdictions? Bitcoin.
You want to try moving $100 million dollars worth of physical gold from Tokyo to Paris? $250k "transaction fee" and takes a few weeks.
I have a prediction for the next 10 years if it's just about price or marketcap. More than $100k USD but less than $1m USD.
As regards the trilemma, Bitcoin does have all three of security, scalability and decentralization. Maybe not just what we were really expecting.
The phrase "Bitcoin Maximalist" was coined by no other than Ethereum co-founder Vitalik Buterin. Because reasons.
Now I like his contribution and I profit from it's existence, but if you want something that will stick around for literally a hundred years and not lose value, put it into Bitcoin. ETH1 is not going to stick around for a hundred years. Probably will die as soon as everyone migrated to ETH2. ETH2 will not last a hundred years either. There will most likely be an ETH3 in the next couple of decades.
Now, LTC ... maybe, just maybe, it will also last a hundred years. The devs working on it are many of the same devs working on Bitcoin anyway.