Elon Musk holding a book about crypto

The book title is "Cryptocurrencies simply explained - by Julian Hosp " and it mostly contains the basics. Julian Hosp is a Co-Founder of TenX cryptocurrency and the book was given to Elon by a colleague of Julian.

Creating a new P2P economy is one benefit, another massive benefit that blockchain tech offers M2M (machine to machine) communication is decentralization. If you're running your interaction infrastructure on blockchain tech, you don't have a centralized database that you'd have to rely on.

Also this technology could be used for some energy producing products that could use the surplus of energy to mine a cryptocurrency related to TESLA that than could be traded and it would be backed by energy. Another speculation is that a cryptocurrency might be used for the Hyperloop project that is looking to revolutionize transportation as we know it and that is soon to come in 2018.

What do you guys think he can use crypto for? Or is this just a move to promote crypto to a larger public?