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Sikh Bitcoin · Beginner · Lesson 4 of 21

Money, prices and units

Separate an amount from its price and its purchasing power.

About 10 minutes with practice. You only need something to take notes with. No real wallet details or payments are part of this lesson.

Course contents · Lesson 4 of 21
  1. Bitcoin without jargon
  2. Keys, custody and keeping control
  3. Payments for humans, including Lightning
  4. Money, prices and units
  5. Follow a payment from request to receipt
  6. Addresses, networks and QR codes
  7. Confirmations and patience
  8. Fees buy scarce block space
  9. Backups before dependence
  10. Scams, urgency and trusted routes
  11. Privacy is a practice
  12. Custody is a relationship
  13. Reading a Lightning invoice
  14. Exchanges and access to bitcoin
  15. Volatility and practical planning
  16. A fair invoice for creative work
  17. Donations with accountable purpose
  18. Proof of work and honest energy questions
  19. Bitcoin and Litecoin: related ideas, separate networks
  20. Read Bitcoin news with a source trail
  21. Capstone: welcome a newcomer safely

What you will learn

  • Convert BTC and sats without rounding away meaning.
  • Separate a market quote from an amount you own.

Three different questions

An amount answers how much of an asset exists in a record. A price answers what another party offers in exchange. Purchasing power asks what useful goods that amount can obtain. These are related, but they are not the same. A wallet showing an unchanged number of sats can display a changing local-currency estimate because the price feed moved. Neither display tells you whether a particular shop accepts bitcoin.

Make the unit visible

One BTC contains 100 million sats. In an illustrative ledger, 0.002 BTC is 200,000 sats. If an application silently switches from BTC to another unit, the digits become misleading. Label both the quantity and currency, use consistent decimal places, and keep calculation precision separate from a rounded display. A zero after rounding is not always an actual zero balance.

Read a quote as a dated offer

Imagine two fictional shops pricing the same item at 20,000 and 22,000 sats. Shipping, fees, quality and timing may explain the difference. A conversion estimate also needs a source and timestamp. An old screenshot cannot establish today’s executable price. Our educational examples teach arithmetic; they do not indicate fair value, future returns or what you should buy.

Practice on paper

At an invented conversion rate of $50,000 per BTC, express 0.002 BTC in sats and dollars. If the quote rises to $60,000, which quantity stays unchanged?

Reveal the worked answer

0.002 BTC is 200,000 sats. Its illustrative dollar estimate changes from $100 to $120. The 200,000-sat quantity is unchanged; fees, spending or transfers would be separate events.

Check your understanding

Choose an answer in your head or on paper, then reveal the explanation. Retry whenever you like. Answers are not submitted or scored; completion marks are your own learning notes.

1. Does a rising fiat estimate prove that more sats arrived?

  • Yes
  • No
Reveal answer 1

No. A valuation change is different from a change in the asset quantity.

2. What belongs beside a conversion estimate?

  • Only a large number
  • The asset, quote currency, source and time
Reveal answer 2

The asset, quote currency, source and time let a reader understand what was measured.

Take this with you

Keep quantity, valuation and spending power in separate columns.

Your learning, at your pace

Read every lesson freely. Optional progress tracking needs JavaScript and browser storage; it does not require an account or wallet.