One reservation many people have about bitcoin is that its value is so intangible. I wanted to demonstrate how various amounts of bitcoin, from 1 sat all the way up to the total supply, equate to lumps of gold, silver, radioactive material, and cocaine.
Each panel converts the BTC amount you select on the slider or with the preset buttons (including the 6.15 make it stack, Strategy's treasury, US Gov holdings) to a cubic volume at live spot prices, with a Shiba Inu at true scale (40 cm shoulder height). The dog started as a joke but after a lot of trial and error it turned out to be the fastest way to make the volumes click intuitively.
Plutonium-238 is so dense (19.8 g/cm³) that even absurd BTC amounts produce a surprisingly small cube. Pretty quickly, bitcoin's value outpaces the amount of Pu-238 ever made. The Geiger counter audio was too fun not to add.
The cocaine panel uses DEA/UNODC wholesale pricing. Rendering a pile of cocaine was beyond me and Blender, so that panel has a still image, for now.
All math is client-side. Prices come from public APIs. The stack is SvelteKit on Cloudflare Pages.
There's more to come, like making it easier to play with the timeline than the janky calendar button. I'd welcome feedback on this, especially whether or not the physical scaling actually lands.