take a deep breath ---and shut up. The purpose of the money changers was
to provide LOCAL TENDER for pilgrims from OUT OF TOWN----the reason the
pilgrims from out of town were there was to take part in the holiday proceedings which were centered in and around the temple---so the temple COURT YARD was a logical place for them to be----sorta like PENN STATION
Roman currency was used all over the Roman empire including Jerusalem and Galilee.