Ammo is good for barter, but so is tobacco, coffee and per the WW II GI, nylons (think the Telly Savalas character in the cinematic flop, Battle of the Bulge).
Note: Savings exposes you to two things - inflation which is higher than the interest payment you receive from the institution (so you lose purchasing power) AND
bail-ins like what happened to bank depositors in Cyprus. See the free pdf or u-toob link at:
http://https://thegreattaking.com/