to buy and sell or not to buy and sell, what choice is there?

Rev 13:17 And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name

Rev 16:2 And the first went, and poured out his vial upon the earth; and there fell a noisome and grievous sore upon the men which had the mark of the beast, and [upon] them which worshipped his image.