A payment gateway is the most important thing to think about with a shopify store because you want to get paid, right?
There is a right and wrong way to do things. You want to provide enough payment options, so you don’t drive away customers, but you also want to keep things simple and streamlined.
One great idea is to allow sellers to save their payment information by creating an account. This will make them feel like coming back again is worth it. You also want to offer options like Paypal, debit/credit, cryptocurrency, and wire transfer.