I'd like to propose a new Proton service: an end-to-end encrypted portfolio manager that would complement Proton Wallet.

Similar to services like Finanzfluss Copilot or Parqet Portfolio Manager or even Google Finance, this would be a comprehensive investment tracking tool where users can:

Track stocks, ETFs, bonds, crypto, and other investments
Monitor portfolio performance with real-time market data
Analyze asset allocation and diversification
View historical performance and returns
Track dividends and capital gains

Unlike existing portfolio managers, all user data would be end-to-end encrypted. Only the user would have access to:

What they've invested in
How much they own
Their purchase prices and dates
Their complete trading history
Their total portfolio value

Current portfolio tracking services require users to upload sensitive financial data to third-party servers where it can be accessed, analyzed, or potentially compromised. A Proton-based solution would ensure complete privacy while still providing the analytical tools investors need.
Integration Potential:
This could integrate seamlessly with Proton Wallet, creating a complete privacy-focused financial ecosystem for Proton users.