“He causes all, both small and great, rich and poor, free and slave, to receive a mark on their right hand or on their foreheads, 17 and that no one may buy or sell except one who has the mark or[f] the name of the beast, or the number of his name. Here is wisdom. Let him who has understanding calculate the number of the beast, for it is the number of a man: His number is 666″ (Revelation 13:16-18).
I’m not saying this is the mark of the beast, but the technology is here for it to be put in place. Along with the RFID chip and other tech, it is available. Biotech will become more and more common, and people will get desensitized. A permanent mark or implant will be easy at some point.