what does bitcoin testing $16k have to do anything with the thing you are calling "Dominance"?
and I sigh deeply whenever I see someone else is talking about this so called "dominance" again and again and again!!!
it is just a wrong comparison to compare a meaningless variable called "market capitalization" to compare how much bitcoin is dominating the market.
you are practically comparing bitcoin with its 16.7 million coins with 1500+ altcoins most of which have at least 100,000 million coins circulating!
16.7 million bitcoin * $16000 = $267,200 million M.C.
1500 different altcoin * 100,000 coins each * lets assume $1 price = $150,000,000 M.C.
do you really think this is a fair comparison?