Where have you seen wire transfers processing instantly? It takes 3 days minimum. This is the traditional banking we are speaking about. Who the hell told you it is instant???
There are some countries with systems in place to allow instant transfers. The Single Euro Payments Area (SEPA) are in the process of setting up a European wide payment processor called SEPA Instant Credit Transfer (
https://www.europeanpaymentscouncil.eu/what-we-do/sepa-instant-credit-transfer) which should allow instant transfers between accounts at any time of day or night. Whether or not exchanges will start using this is another matter, but it is certainly possible.
Fiat banking systems are generally pretty slow and archaic, but the US banking system is very poor even by those standards. Perhaps the growth of bitcoin might force them to actually modernize a little.
I'd be interested to know which countries have
right now these systems you are referring to. SEPA as you are saying is "in the process" of creating an instant wire-transfer processing system, which in banking terms means 2-10 years.
So you are basically saying that their is no system available to process transactions in the same day.
I don't understand why you don't answer my question with a simple yes you are right and you are starting with "There are some countries with systems in place to allow instant transfers."
Which countries are these? Can you go in detail?