Not sure what your idea of strength is when you are quoting that article.
But right now btc dominance is over 68%. I was surprised that in early july ethereum had about a 28% dominance. Which was strange and bitcoin dominance back then fell to below 40% for the first time in a long time.
that's not dominance my friend and it doesn't matter if big websites like coinmarketcap.com call it "dominance" it still doesn't make it so.
it is simply a number that shows the amount of supply each coin has. ETH has more than 100 million supply with about 70% of it premined and not in circulation. bitcoin in comparison has only about 18 million and with no premine whatsoever and everything that was created entered circulation.
in math when calculating (x*y) you increase "x" 5.5 times you can increase the result by a lot even if your "y" is smaller.