When Rome collapsed, it became a church. Cough A very expensive church, I bet. Full of gold-plated crucifixes and stained-glass windows made out of, like, real sapphires.
When Britain collapsed, it became a bank. A massive bank, of course. Full of... wait for it... Pound notes! Paper money! The very thing that could have saved them in the first place!
When America collapsed, it became the internet. A glorious, chaotic internet, filled with cat videos and people arguing about the merits of NFTs... and, somehow, also launching rockets into space.
When the internet collapses, it will become Bitcoin. A decentralized, immutable ledger of, you guessed it, Bitcoin. It's like the internet, but... less cat videos, more Bitcoin. And maybe some space-faring Bitcoin miners.
When Bitcoin collapses, it will become an interstellar space travel civilization. Wait... what? Bitcoin collapses? Hold on, I need my espresso machine and a new pair of moon boots... Yeah, an interstellar space-faring civilization powered by... Bitcoin. We'll be mining asteroids for more Bitcoin, launching spaceships with Bitcoin as fuel... because, let's be honest, who needs rocket fuel when you can have Bitcoin fuel? We'll have Bitcoin-based space laws, Bitcoin-themed spaceships, and maybe a Bitcoin-flavored space ice cream. The real question is, will it be on the blockchain?