It is conceivable that bitcoin dominance goes well beyond 70% which will well drain the altcoin market further down. It is going to get worse if someone more institutional investors join the cryptomarket
Bitcoin dominance was about 85%+ from 2013 to early 2017, I expect it to go back to that point. GD near every altcoin is nothing but a bunch of future promise that will never deliver. The only thing I can count on right now is the greatest idea, invention and investment of my and our lifetimes - bitcoin. Let it ride.
Well... you have a point there. The dominance dropped due to the ICO boom in 2017. There was a sudden decline from 85.1% in January 2017, to 33.4% by January 2018. That means that in just one year, the altcoin share increased from less than 15% to 67%. Most of this increase can be explained by the ICO boom, but there were a few other reasons as well, such as the forking of BCH and BTG.
you are totally right, and i don't think that we will see such a parabolic altcoin rise again. maybe a few will be pumped, but i don't think that the btc dominance will go much lower as 50% again in the future.