Good work. A good and simple educational tool.
It could be useful for beginners to teach them some basic concepts related to Bitcoin, Satoshi, scarcity, etc.
But I don't understand what you mean by :
"Milestone progress (how close you are to the next round number)."
I don't understand what exactly you mean?
Thanks a lot for the merit and feedback!
About the milestone progress, it just measures how close you are to the next predefined stack level.
I manually set a few round-number milestones like:
1,000 • 10,000 • 100,000 • 1,000,000 • 10,000,000 • 100,000,000 • 1,000,000,000 • 10,000,000,000 sats
So for example, if you hold 75,000 sats, you’re 75% of the way between 10,000 and 100,000 sats.