Cryptocurrency exchanges process trades in-house, without the need to access a blockchain, except for transmitting currencies in or out.
Even so, blockchain technology allows for one of the fastest transmission means for money that's possible.
When is the last time you've sent money from one bank to another, or waited for a credit card company to put money back into your account after a return? It takes days.
You've been on many threads posting many lies about many things. This is but one example.
All exchanges, including commodities and stock exchanges from time to time experience transaction delays due to increased activity. Cryptocurrency exchanges are no exception.
You are one confused little boy. Confusing the time it takes to swipe a card at a point of sale register or to transact a stock trade with the back end bookkeeping time to do settlement displays that. Those up front transaction rates are in the TENS AND HUNDREDS OF MILLIONS PER DAY.
What is the maximum theoretical transaction rate for Bitcoin?