I believe we'll go back to 2022 Bitcoin dominance by 2022.
The next halving should have put us past 6 figures, somewhere from $100,000 to $500,000 (to difficult to know where it will peak before the crash once we get past the 6 figure psychological barrier which is an huge accomplishment.. I predict tons of people getting rekt as they sell at $100,000 and open shorts expecting the price to crash right at $100,000)
By then the fact that most alts are scams should be obvious to even noobs and BTC will go back to the natural 80% balance as per pareto law distribution.
The alternative is there is a possibility we don't quite get past $100,000 and fall right before getting there, which would give us a a year or two of dipping before we actually get past $100,000 which will definitely crush altcoins.
A bitcoin dominance of that size by that time makes perfect sense to me, or at least something close but at the same time I do not know if you are correct about your prediction about the value of bitcoin, I can easily see bitcoin reaching 50k by that time but unless the adoption of bitcoin explodes then I find very doubtful we are going to reach 6 figures in less than 4 years.