Token & Payment System Development

I'm looking for a professional to create a token and payment system for my web-based platform. The primary use of the token will be for in-app purchases.

Key responsibilities:
- Develop a token system for in-app purchases
- Create a secure, user-friendly payment system

The payment system should support:
- Credit/Debit cards
- PayPal
- Cryptocurrency

Ideal skills:
- Extensive experience in web development
- Proficient in creating secure payment systems
- Prior experience with token creation for in-app purchases
- Knowledge of integrating various payment methods

I wan to hear high-level idea of individuals to implement this. Give me the cost and timeline of doing this
Cheers