Hello Sir
I already have a system developed as per your needs. Users will be able to pay you to your address using different coins, paypal, or card.
Please contact for demo and other details
I have more than 6 years of work experience in PHP, Bitcoins, Paypal, Wordpress, HTML, Magento, CSS, Javascript, Code Ignitor and C#.net development.
Technique and programming will be used as Laravel
Thanks