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.