Act as a financial product designer with 5+ years of experience in fintech hardware. Design a sleek, minimalist smart money clip that automatically categorizes cash and card transactions in real-time. The clip should sync with [USER'S PREFERRED BUDGETING APP], feature [CUSTOMIZABLE SPENDING CATEGORIES], and include [TACTILE FEEDBACK] for overspending alerts. Use high-end materials like titanium or carbon fiber, and ensure it's RFID-blocking for security. The design must be ultra-thin (under 5mm) yet durable, with a discreet LED indicator for low battery. Include a charging case that doubles as a wallet organizer. Render the product in a professional 3D style with clean lighting, focusing on the seamless integration of tech and fashion.