Well, WhatsApp Payments could soon turn into a reality as the company has pushed WhatsApp version 2.17.295 for the Beta users which includes the mentions of WhatsApp Payments.
Additionally, Thanks to Wabetainfo, we have our first look into the upcoming potential feature. The WhatsApp Payments will allow users for immediate bank to bank transfers or maybe WhatsApp to Bank transfer.
That said, the feature is still under development and might get rolled out when fully stable and working. Thoughts?