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.

Absolutely, the concept of owning things on the internet is indeed a massive opportunity that continues to grow with the advancement of technology. Public blockchains have opened up new possibilities for owning a wide range of assets such as identity, money, data, infrastructure, products, art/media, experiences, and attention. This decentralized approach to ownership has the potential to revolutionize various industries and empower individuals in unprecedented ways. The potential for growth and innovation in this space is truly exciting.