How does excess regulation keep PayPal from being a payment alternative? People can currently use PayPal to do business if they wish. You could take PayPal transfers at a grocery store.
There is a case for regulation blocking crypto in some areas, but certainly not all and it still has yet to find meaningful traction as a payment processing mechanism.
With credit cards it is more so lack of regulation. With low enough caps on fees it is lot less of an problem. Still should mandate them to serve all customers. And only kick them out after certain fraud threshold.