This is only up to us to educate the merchants about the benefits of BCH. Paypal took years to become widely used. Same as credit cards.
The biggest concern I hear is of KYC/AML. How to convince the businesses that B2B is safe with BCH, that the payer can be easily identified, to meet legal requirements?
One day it will be solved with the help of identity on the blockchain. Until then KYC can be done the same way as in with cash payments since its practically the same thing.