Some ideas
If it's going to be futuristic sci-fi, make it futuristic.
Some key concepts to touch on beside blockchains:
- automation
- UBI
- transhumanism
- AI, AGI and maybe even ASI
- brain computer interfaces (BCI)
- Matrix-like virtual realities
- isolated brains using BCIs that permanently live in VR
- immortal synthetic minds that live in VR and reside in orbit around the Sun.