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.