I've been following Bitcoin's market dominance for a while now.
actually what you have been following has been the "altcoin market cap bloat" not bitcoin dominance otherwise you would have known that bitcoin dominance is more than 95%. but when you look at the bloat of the total market cap that is caused by altcoins and decide to call that "dominance" then that is a different story.
and it has been decreasing because a lot of altcoins are reaching their end of line and dying. so as they get dumped and disappaer their market cap disappears with them and the bloat shrinks hence increasing that percentage you were looking at.
Well, it's not me just calling it 'dominance', it's the term coinmarketcap.com uses, and I believe it makes sense. This is simply a share of market capitalization that Bitcoin takes from the "total" (I guess it's not total-total since not all of the altcoins are listed on coinmarketcap). And this share is currently above 60% and used to be below 40% at the end of 2017. I am not sure what you mean by bitcoin dominance being above 95%, and how this number is calculated. I am talking about objective data here, and an interesting difference I noticed. You are right that they are getting dumped, though, but I thought they'd be rising again, and they aren't.