Theft is mostly a crime of opportunity. A thief will pocket an item just because no one is around or looking. If you do not want your tennis bracelet taken, then hide it, but where?
Next to valuable objects out in the open, filchers go for jewelry boxes and sock drawers. Can Safes are no obvious storage places. These diversion safes copy familiar tea, beer and soda cans that never appear to contain anything expensive.
Also, a 7UP or Coke Can Safe will not look odd in a gym bag or school backpack. Carry cash where muggers can’t sight it.