I agree that twitter user might be the easiest to shift to Steem. I think Redditors would also be quite easy to make the shift. I think it's only a question of time.
I agree the market cap thing is more of a dream than a assurance yet as good as it might look, my mind is set on some other thing than money. I can't deny people are dying over the lack of it and so currently money is a big part of social change I want to see and put my mind to but I try to avoid going insane over money, always wanting more and forgetting the more fundamental stuff of life.