"Price literacy" sounds fancy, but it's an everyday skill: when a number lands in front of you, can you decide quickly whether it's cheap, expensive, or in the right ballpark? That muscle sits under every later everyday price decision. Long before you react to a news headline, before you evaluate a politician's claim about "unaffordable housing," or before you sanity-check an item on a receipt, you need the ability to ask — does this number even make sense?

When price literacy is weak, the first thing to wobble isn't the speed of decisions — it's the direction. Accept a wrong number and everything stacked on top tilts with it.

Three core axes

The version of price literacy we train here has three axes:

1. Scale — do millions, billions, and trillions feel different in your bones? A $1B startup and a $1T S&P 500 giant are not "a lot bigger" — they're 1,000× different.
2. Time — $10,000 in 2000 and $10,000 in 2026 are not the same unit. Inflation and compounded returns assign very different meanings to identical figures.
3. Unit — "a 5억 won house" — where? what size? listed price or closed sale? Without a unit, no two numbers are comparable.

Traps you start to dodge

• "Half off" offers that are actually near cost.
• "10× in 10 years" claims that turn out to be single-digit annualized once you compound them.
• "All-time high" headlines that look ordinary when you rescale to per-capita or real terms.
• The same asset looking different across USD/KRW or pre-tax vs. post-tax framing.
• Marketing-scarcity phrases that don't match the real supply in the market.

Training with PriceGuess

Each mode flexes a different muscle. Doing one or two per day consistently builds intuition faster than binging every mode once in a while — we remember things we see often better than things we see a lot in one sitting.

• Daily — calibrate absolute price scales per asset.
• Higher or Lower — drill relative comparisons.
• Big Mac Index — train purchasing-power intuition.
• Time Machine — get fluent in past-vs-present conversions.
• Shopping Quiz — keep your everyday price sense honest.

Before you read on

This guide and the articles it links to do not recommend buying, selling, or sizing any specific asset. The goal is to give you tools to decide whether a number looks reasonable. Real investment decisions still belong with regulated brokers, official filings, and advice tailored to your situation.