Suggestions/Possible Improvements:
- Satoshi and Gavin A minifigs
- More databases (large blockchain)
- More floors
With apologies, a computer labeled HAL juxtaposed next to an ice machine.
In spite of one comment I read, I say you did a fine job.
Taking it one step further, I envision a Laissez Faire City built entirely outta Legos. Instead of selling acres, you're sent either loose Legos or some completed building to add to the community.
Taking it even one more step further (scratching the LFC idea somewhat), you build a huge display depicting B & M's of viable Bitcoin-based entities that represent their brands, calling it...wait for it...bLØckGOpolis.