(Sorry for this double post, accidentally sent to wrong person as reply.)
Biometrics is "the number of a man" (as opposed to the social security number systematically assigned to represent a person). If a form of ID is required to make a purchase (buy) or have a job ("sell" your services); this is directly in line with the "mark of the beast", if not it. After these IDs start to get stolen, creating a major identity theft problem; then, the "verichip" implant solution, most likely, would be offered next.
According to Rev. 13 KJV; a Christian could not take such a "mark" or form of identity. This would leave Christians as "non-citizens" or being viewed as terrorist.
"Those who give up liberty for the sake of security deserve neither liberty nor security." -- Ben Franklin