“’future currency is’: AMMO”
One shouldn’t need too much of that.
One round to make one example, plus a few more for possible additional examples.
‘pour encourager les autres’
The history of that phrase is interesting:
https://www.everything2.com/title/Pour+encourager+les+autres
I still have well over 150,000 rounds for 8 calibers left, after selling 50k to friends and family, for cost.
You will also need a group of like-minded people for when the hordes show up. Nobody is going to be able to go it alone. Think of small towns far removed from big cities.