This prophecy speaks of a widespread openness to receiving the "Mark of the Beast", the symbol of the AntiChrist, which will allow everyone during the Tribulation to buy and sell. Right now it's clearly evident that this openness is in full swing as people are very accepting of many, many new prototype "Mark of the Beast" type technologies that are being introduced all over the world. So when the man of sin comes onto the scene, it won't take much to get people to gladly take the mark without hesitation.
UPDATE (2018-02-02): I'm marking this one as "in progress" again as recently developments seem to be putting this prophecy in motion again.
(*Do you have a better description, or did you find an error? Please let me know.