Can I ask a question that is a bit off topic?
Can I send a NXT transaction instantly? When I mean instantly I mean in 1-2 seconds.
And can then the person receiving the payment use that money instantly safely to make a payment?
You can send and it will get into that person's wallet within seconds (just like other cryptos), but that person would have to wait at least 1 confirmation to use that money to make a payment.