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.
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 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 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.