Money is great to have, but it sucks when you realize one morning that it does not worth anything anymore, or lose 50-60 % of its value. It happened many times trough the history.

It is cool to invest it in something really valuable, preferably into the something that gonna gain value when SHTF, food, ammo, etc.
It is also good to have some amount always with you, in case of bribing someone in first days of chaos, when people still gonna think that money matters.