Crypto Dashboard

Live ratio dashboard tracking Bitcoin against gold (XAU), Ethereum against Bitcoin (ETH/BTC), and USD against satoshis all in one place.

Screenshots

BTC / XAU	ETH / BTC	USD / SAT

Widgets

Widget	What it shows
BTC / XAU	How many troy oz of gold one Bitcoin buys
ETH / BTC	ETH price denominated in BTC
USD / SAT	How many satoshis one US dollar buys

Switch widgets from the dropdown in the header. The selected widget and chart range are preserved in the URL (?widget=&range=).

Stack

• Next.js 16 (App Router, Turbopack)
• React 19 + TanStack Query v5
• Recharts for charts
• Tailwind CSS v4
• pnpm monorepo (apps/web, packages/utils)

Data

Prices are fetched from the CoinGecko public API:

• Bitcoin and Ethereum via their native coin IDs
• Gold via tether-gold (XAUT — 1 token = 1 troy oz)

Current prices refresh every 30 seconds. Historical data (365 days, daily) is cached for 3 hours via Next.js Data Cache.

Getting Started

pnpm install
pnpm dev

Open http://localhost:3000.

Build

pnpm build
pnpm start