> And [the Beast] causes all, the small and the great, and the rich and the poor, and the free men and the slaves, to be given a mark on their right hand or on their forehead, and he provides that no one will be able to buy or to sell, except the one who has the mark, either the name of the beast or the number of his name.
Like most of Revelations, I think this needs to be interpreted in the context that it was written. Jews during the time of Nero saw Nero as the "the Beast". From what I understand, these "marks on the hand" were a plan by the Romans to control Jewish citizens in much the same way that modern governments try to control slum populations. I doubt the author foresaw contactless credit cards and Apple pay, though I admit that the authors of both the article and of Revelations were worried about similar consequences.
How else would you describe 21st century RFID using 1st century vocabulary? Revelation was written 2,000 years ago, and is supposed to be about things in its future, after all.
Why did it need to use 1st Century vocabulary?
I am a practising Christian, and in my heart, I suspect Jesus would say something like "don't worry about how you pay for physical stuff".