I think MasterCard will use a different type of cryptocurrency than you are familiar with, called "stablecoins", like the USDC and/or DAI. These are pegged to t

I think MasterCard will use a different type of cryptocurrency than you are familiar with, called "stablecoins", like the USDC and/or DAI. These are pegged to the USD and never go up or down. Most likely, they will use things like a "state channels" for the actual transactions. State channels are like pre-paid cards, where the channel gets settled after the entire card is spent. But why? Well, cryptocurrency makes sense over traditional currency, because it's programmable, auditable & composable with many other dapps that exist on the blockchain.