Market dominance based on market cap is an overrated thing. When bitcoin dominance was about 52% a lot of people were worried about how it was losing its dominance, and I find it very amusing because it's not important at all.
Bitcoin is Bitcoin, and there is only an unique Bitcoin project with its market cap calculated in market dominance index. At the same time, there are more altcoins in the market and over years, there have been more abundant altcoin projects launched with more market cap calculated for altcoin dominance.
Hence, Bitcoin dominance nowadays is different than in the last year and very different than in past years when there were less altcoins than now.
We can even look at the coin with superior features. There's a reason big corporations choose bitcoin as their asset, and rumours of countries talking about bitcoin reserves. That's dominance.
I disagree in your definition of dominance.
Bitcoin dominates cryptocurrency market but I disagree with your definition on this term.