>"So if I'm saving up in a deflationary currency, it's better for me to wait upgrading my computer until the day before I die, instead of doing it now?"
If you're maximizing your economy, yes.
If you're maximizing your economy, yes.
> In a predictably deflationary environment, you maximize your economy by spending your money "later".
Which, in fact, is better said as:
> In a predictably deflationary environment, you maximize your economy by not spending money.
And that leads us to the obvious fact that saving up money in order to not spend them is absolutely pointless.
Imagine I need a car and I hear there is a 30% off sale in January. Yes, I'll wait. Im considering the lost marginal value to me (keeping my shitty car in December) vs marginal gain (saving 30%). That's what deflation feels like.