How steemit is able to create value "from nothing" ? [100% Power Up]

Everybody is asking me "how it's possible to earn money, how this blockchain is build?"

Learning IT and blockchain I'm here from only one month and I start to learn how steemit is build to create a solution in differents others use cases. This question always remain, how a cryptocurrencies can generate more value "from nothing"?

First I was thinking that was a code like a printing steem machine to create value and make deflation and nobody want deflation... only buyers maybe but here you can start from nothing, it's just a matter of time and creating content.
But, the other possibility is that simply because a lot of steem are locked in steem power so the margin trading is always pulled up. How can it's be possible? If you lock a steem, the one who want to buy steem wile pay more expensive and then it's can maybe make the price raising, if the price raising then you have more value to reward people in the system. This is only the beginning of my brainstorming about the question, so if someone who really know the whitepaper of steemit, please give us more information.

Also, the fact that steemit is a social network who will attract a lot of users in the next years bringing value in form of money or of content and earning money back. I don't know until this sharing while go but i'm really excited about it.

If you have a better answer to the question : How steemit is able to create value "from nothing" ?
Please comment this post.

A big thanks for reading me and participating =)