PumaPay intends to use blockchain to make a ditect payment flow from user's funds to merchants.

Card networks include several banks and processors in every payment. Lots of friction to be removed so there's lots of room for improvement.

However, to be honest, I don't think those titans are going down. PumaPay has a great concept and I see it as becoming an alternate payment method instead of the only payment method. Think of it as your options going from cash or card to cash, card, or PumaPay, especially if you want to use crypto for payments.