I suppose that the Bitcoin Dominance can grow a little more if ETF gets approved but I dont think it can go further than 65%, even I think that 60% of bitcoin dominance is a lot, we need to wait and see what happens when the time comes, Bitcoin will grow continuously but also altcoins will do it.
Yes.I see bitcoins and altcoins will grow hand in hand.But bitcoin dominance will continue to increase if all investors will not stop investing in bitcoin.As days and months passes by,i'm sure bitcoin will be more popular and will gain more dominance from other crypto coins.