good post. I think about similar things. Here some suggestions:

• https://lamium.io/ = helps you to pay all your bills in crypto
• https://propy.com/ = Blockchain based property transfer, offered real estate are very expense unfortunately
• @bitnation is helping to creat your own country or at least legislation, so could have contracts made via blockchain

Enforcement is an issue, but you now can 3d print guns as well.