I’m not entirely sure if I understand your question(s) fully, but i’ll do my best to shed my light on it.
First off, I totally believe you are right about the part that in forseeable future the majority of us will still be dependent on the (centralised) banking systemt and fiat for our day-to-day payments. The adoption of crypto is tugging along, but still has a long way to go before the infrastructure is ready for millions of users. That’s why it’s important for exchanges to have fiat on/off ramps. A fiat on/off ramp is a collaboration with a banking partner, so customers can buy/sell cryptocurrency for fiat. Nash has established a multitude of such collaborations, and fiat on/off ramps will be part of the MVP. This means that in the foreseeable future, you can still use your own bank for your fiat payments as you are used to.
You further informed how you can create a transfer to a merchant. This will be done via Nash Pay. I haven’t read this part fully to be honest, but I do get the general idea. The beautifull thing about Nash Pay is that the payment will be settled p2p. It doesn’t require any custodial, because the payment utilises the decentralised networks from the currency of your chosing. From my understanding, the Nash wallet functions as a universal wallet. This mean that you will create one wallet for each of the blockchain that’s being traded on the Nash Exchange, stemming from one pnomic seed-phrase (24-words usually). Now, for the payments between different blockchains. Let’s say you want to pay in ethereum but the merchant only accepts bitcoin, you can make that transaction via Nash Pay (which will be operational on phones, android and ios). From my understanding it will be as easy as login, scan the QR-code and accept the transaction. In the background, Nash Pay will switch the assets by trading them automatically on the Nash Exchange.
Please feel free to correct me if i’m getting something twisted here!