I agree with you on the end game being in BTC and not USD or other fiat.
The recent BTC move to 11k has validated the logarithmic BTC-Price chart and it's implications, at least in my oppinion.
As for alts I do not think that they will die, but am also unsure if they will go as high as they used to be.
My portfolio (mostly alts) tanked 50% in BTC but went up 30% above ATH in USD, so this would mean if my alts would go to their BTC value before 11k-Move I'd be in massive profit and this is unrealistic.
E.g. if an alt that tanked 50% (many did more) rises to a new ATH it means the BTC value goes up 50%+ but that same BTC did a 100%+ during the 11k-Move.
TLDR: I don't think that people will be willing to pay the same amount of sats for an alt now that the sats itself have doubled.
Maybe we all should draw a big vertical line on our alt charts for the 11k-Move and call it a new era for alts now, establish new prices and expectations.
This is the most trickiest of all things to work out. When do you buy a coin, sell a coin, hodl a coin and then resell. I wish I had the answer but usually when a new coin comes out it gets a pump, on that pump it is wise to sell then buy on the dump and ride the waves. Also are you looking at your end game in satoshi or dollar value. Some coins have gone to the pits in sat value but have risen considerably in usd value.
I made the mistake of always looking at the dollar value so now I am looking more at satoshi value and that s where I will make my new end game play out, well here's hoping that is. I have done o.k ths year am not in loss, but I could have had 10 times more than what I got now if I had sold everything at BITCOIN VALUE ATH. So big lesson learned.