Earlier quoted context omitted.
Fiat currencies discourage saving by gradually stealing the value of the saved money via inflation. Theft isn't essential to trade: people will still innovate and exchange without being coerced into doing so by the systematic devaluation of their previous economic contributions.
I don't think there is any reason to encourage saving money. Living within your means, yes, investing, yes, but saving under your pillow, especially if you had a non-inflating currency, isn't good for the economy. Even if it should be encouraged, it doesn't matter the logic of it, people won't accept making less and less money over time. Non-fiat currency + population increase makes that inevitable.
It's good for the individual if investment opportunities aren't adequately regulated.