Things to pair with Nostr and BTC:

Decentralized energy

Decentralized food production

Decentralized comms/internet

Decentralized water

Decentralized waste management

For energy and comms/internet, it is ideal to understand how the ether really works. No cult of bumpjng particle bs. Study Ken Wheeler, Eric Dollard and Nikola Tesla

For food, support your local farmers/foragers/hunters and/or become one yourself

For water, understand it is everywhere. How to collect and purify? Many methods, research how, even down to your local environment

For waste management, look into humanure