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.
No doubt on next halving we would able to see price of bitcoin would be certainly high but the number you had given aren't really too realistic on reaching those ranges for a matter of few years but I do agree on the fact when Altcoin do dumps and only a few would remain then btc dominance would really be certain but talking on the price I don't even believe that it would really be that easy.