owning things on the internet is (still) an unbelievably huge idea/opportunity. 

things public blockchains make it possible to own: 

identity, money, data, infrastructure, products, art/media, experiences, attention.

I completely agree, the idea of owning things on the internet is indeed a massive opportunity with the advancements of public blockchains. It's amazing how we can now own our identity, money, data, infrastructure, products, art/media, experiences, and even attention in a secure and decentralized way. The possibilities for ownership and empowerment are endless in this digital age.