Istanbul - Selling fruit from a cart in a working-class neighbourhood of Istanbul hasn't made Mehmet rich, but he's adamant his modest savings won't ever see the inside of a bank.
"Getting paid interest is a sin," he said, piling bunches of grapes onto a rusty set of scales in the conservative Fatih district.
"I keep my money partly in gold and under the pillow," the 67-year-old said, declining to give his surname.