I think STEEM is onto something mainly because of the incentivization of content, but since it takes time to build monetarily valuable content that can't be the sole reason why this platform will take off. It has specialized knowledge dispersed in different categories, but I would assert information related to cryptocurrencies/blockchain technology and the transmission of that in a manner analogous to Facebook will enlarge as prices of cryptocurrencies continue to skyrocket and suddenly it becomes the modern day gold rush and due to fear of missing out, people start "digging" on the web for valuable cryptocurrency/blockchain advice and people enter this platform and start connecting with the community. So....