Very informative article.
All value comes from demand, bitcoin and steem would be worth nothing if people would not like it.
Steemit is growing rapidly, both in userbase and in the number of high profile people joining us. People will buy Steem in expectation of the rise of value of the network. And not just Steemit, we could have many other exciting things on the Steem blockchain.
For example a market:
https://steemmarket.sharetribe.com/