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One of my many hobbies. It's a lot like Steemit. The potential behind the idea and full use of the ability it provides are massive, but they are also some distance in the future.

I actually wrote a bit about it a while back...
https://steemit.com/technology/@bp9930/exploring-the-new-economy-3d-printing-tips-for-beginners

Can we build blockchain WIFI?

Most likely. A company named DENT looks like they're doing something along the line of cellular networks. I'm assuming WIFI will be done eventually.

Also one that I've got scheduled on my white paper review list today, Privatix. Blockchain based VPN and Broadband market. Plus it's ticker is PRIX.

awesome