Hi Greetings,
I did 3 website as you mentioned, but do have any idea about the API for store the Crypto currency once anyone pay you. If not i can suggest you. Waiting for your message in private chat for more detail about the project.
1) Project goal and business story of the project
2) Targeted country and targeted user
3) UI/UX expectation
4) How many user type will involve in this project in respect of business goal.
5) Server and Hosting Plan
I have 10 + years of experience in web and application development fields. My expert skills are PHP, WordPress, CI and Laravel with front JavaScript/jQuery and Bootstrap HTML design.