investors will come when there is a vibrant community. a blockchain's strength is the people in it. when i talk to some of my friends about steemit, i am always faced with the question of Steemit's business fundamentals. They dont see any.
Naturally this is to be expected because everyone is trying to figure out what works and things that fail. But Steemit's growth path has been confused as many others have pointed out in other comments. there does not seem to be clarity of purpose.
The way to pull in other communities is to be a successful community yourself. this is a question that investors have when i share Steemit with them.
My spiel would be that Steemit can become the world's first crowdsourced premier curation service. It has the ability and the infrastructure to scale to millions of knowledgeable curators who can finally make quality content a paid model via consumer subscriptions. It can enable millions of smaller publishing houses and disrupt the content publishing industry.