You seem to have misunderstood you Econ 101 classes because "supply" isn't the same thing as "production", "demand" isn't equivalent to "consumption", and "intrinsic value" is a completely artificial construct.
Also, people save mostly because they want to spend later, invest mostly because they want to have more money, and consume mostly because they want the wealth. Inflation and deflation have very complex and often non-intuitive relations with those three. You can't just extrapolate from Econ 101, not even after you understand it right.
Investments require taking on risk and...they actually require skills to do right (e.g. Doing your homework). So you might want to invest to get rich, but you might not want to invest because you aren't good at it or do t want to become poor. It still has to be incentivized, especially when most people just want comfortable lives.
You seem to have an agenda in introducing more relationshios above this one simple fact. So make your point rather than just claiming my ignorance, because no points were argued in your post.
What's that supposed to mean?
How does consumption "have to" match production? How do you figure "money has no value"? Now you're talking about "intrinsic value" but earlier it was just plain "value".
People save money for a reason you know. If money has no value, as you originally claimed, then there's no reason to save or possess it. If money has no "intrinsic value" that doesn't make your original claim any less confused.
But to be precise, value is purely subjective. We've been using the word somewhat ambiguously. Value is utility as a means towards an end. Money, as a medium of exchange, has utility as a means towards countless ends, and that's exactly why everyone wants it.
You say people have a disincentive to invest because it's risky, but I don't see a point there. It all depends on the investment opportunity, and the investor's tolerance to risk etc, ie. the circumstances. Some people do invest, some don't. So what?
You say that not investing doesn't "solve any consumption problems", but what the hell might those be? Again, why does consumption "have to" match production? What does that mean? What's a "consumption problem" and whose problem is it, and why?
Why is (price-)deflation a problem, considering it means our purchasing power is increasing? Do you really want to claim people want less stuff for their money?
Don't pretend you're giving me an economics lesson.
Some of us actually have advanced degrees in Economics, so let's not act like you're Krugman himself.
If you produce and no one buys, then you stop producing because you are providing no value; simple. If your production is non perishable, you could pay rent and upkeep to stockpile it, but value is lost regardless.
People have an incentive not to invest because investing is risky. Many would just sit on a gold hoard than to risk losing it, but that behavior doesn't solve any consumption problems (worse, it leads to temporary deflation, since that gold is taken out of circulation).
This isn't rocket sicence, most of us have college degrees, this is just Econ 101.