What is needed is a new 'add-on' payment processor that will work with existing merchant accounts alongside Visa and MasterCard that is just for cryptocurrency backed card providers and allow the existing equipment to function with a new card brand.
Surely one of the 'Card Associations' or 'Acquiring Banks' could resolve this on an international level?
The acquiring bank could also hedge any drop in crypto value now that option contracts are available (limited to Bitcoin atm). They could also benefit on upside gains during batch processing delays (This may become the Lighting or Raiden Network equivalent, except without delay).
With the mathematics figured out, this could potentially be worth far more than the current use of processing fees.
What exactly are the technical and legal difficulties to overcome and actually implement this new payment gateway?