I'll create a mobile-first crypto portfolio management app with a clean, modern interface optimized for mobile devices.

I've created a comprehensive crypto portfolio management app with the following mobile-first features:

Key Features:

• Portfolio Overview: Total value display with 24h change tracking
• Quick Stats: Asset count, gainers, and average value cards
• Holdings Management: View all crypto assets with real-time values
• Add New Assets: Dialog to add custom cryptocurrencies
• Responsive Design: Optimized for mobile devices with touch-friendly interactions

Mobile-First Design Elements:

• Sticky Header: Portfolio title stays visible while scrolling
• Touch-Optimized: Large tap targets and smooth interactions
• Scrollable Holdings: Efficient use of screen space
• Clean Cards: Easy-to-read asset information
• Mobile Dialog: Full-screen friendly add asset form

Features Included:

• Real-time portfolio value calculation
• 24-hour change tracking with visual indicators
• Individual asset performance monitoring
• Add/manage crypto holdings
• Responsive grid layouts
• Professional color scheme and typography

The app uses sample data for Bitcoin, Ethereum, Cardano, and Solana, but you can easily add any cryptocurrency through the "Add" button. The interface is designed to be intuitive and efficient for mobile portfolio management.