Design real-time crypto prices homepage

Design a system that powers a “crypto explore/home” page (like an exchange’s market page) that:

• Shows a list of crypto assets (e.g., BTC, ETH, SOL, …)
• Displays near real-time price updates (and optionally 24h change, volume, etc.)
• Updates many concurrent clients efficiently (web + mobile)

Assume you have access to upstream market data (from exchanges/market makers/internal pricing service) that produces frequent ticks.

What to cover

• Requirements (latency, freshness, accuracy, ordering)
• APIs for initial page load and live updates
• Data ingestion/normalization and internal price computation
• Fanout strategy to clients (WebSockets/SSE/push)
• Storage, caching, and historical needs (optional)
• Scalability, multi-region, reliability, and monitoring