21VOX

Your dollar is shrinking.

In 1970, a dollar bought a dollar's worth of goods. Today, that same dollar buys what twelve cents would have bought back then.

$1.00
purchasing power of $1 from 1970
A dollar lost 88% of its purchasing power in 56 years
Bread
$0.25 in 1970
$4.00
16x more
Gallon of gas
$0.36 in 1970
$3.30
9x more
Cup of coffee
$0.25 in 1970
$5.50
22x more
Movie ticket
$1.55 in 1970
$11.50
7x more
In 1970, a family of four ate dinner for $5. Today, that same meal costs $42. The food stayed the same. The money lost its value.

Someone keeps printing.

The US money supply from 1970 to 2025. Each bar is one year. Look at what happened between 2020 and 2022.

$6.2 trillion
printed between 2020 and 2022.
M2 went from $15.5T to $21.7T at its peak, a 40% increase.
Source: Federal Reserve M2 Money Stock (FRED)
More dollars chasing the same goods.
You see it every week at the grocery store.

What if money had a limit?

Bitcoin has a hard cap of 21 million coins. No government, central bank, or company can create more.

21,000,000 FIXED FOREVER

Gold

TOTAL MINED
~212,000 tonnes
NEW SUPPLY / YEAR
~3,500 tonnes (~1.7%)
No fixed cap

Bitcoin

TOTAL SUPPLY
21,000,000
NEW SUPPLY
Halves every 4 years
Hard cap. Forever.
Gold held its value for 5,000 years because it was hard to make more. Bitcoin is the first money with a supply no one can increase.

You don't need a whole one.

Each bitcoin splits into 100 million pieces called satoshis. You can buy a few cents worth.

0
satoshis in one bitcoin
You don't need to learn everything at once.
Start with one question: who controls it?

No one is in charge.

If you take out the center of a bank's network, everything collapses. Try removing a node from Bitcoin's network and see what happens.

Centralized

Banks, governments, companies
Click the center node (marked in red)

Decentralized

Bitcoin's network
Click any node to remove it
No single point of failure.
The network keeps running regardless.

Send money anywhere.

$500 from New York to London. Same amount, two very different paths.

International Wire

The traditional way to send money abroad
  1. Alice initiates transfer at her bank
  2. Her bank verifies and debits account
    ~1hr
  3. SWIFT network routes the message
    ~4hr
  4. Correspondent bank processes exchange
    ~1 day
  5. Bob's bank receives and holds funds
    ~1-3 days
  6. Bob sees funds (maybe)
1–5 days
Time
$25–$50
Fees
4+
Middlemen
Mon–Fri
Hours

Bitcoin

Peer to peer. No intermediaries.
  1. Sign · Alice signs with her private key
  2. Broadcast · Sent to the network in seconds
  3. Confirmed · Miners add it to the blockchain
~10 min
Time
$0.05 – $5
Fees
0
Middlemen
24/7/365
Hours
No bank in the middle. So who holds your money?

You actually own it.

Your bank holds your money and gives you permission to spend it. With Bitcoin, you hold the keys yourself. Want to go further? Read How Bitcoin Works or jump straight to How to Buy Bitcoin.

THEIR VAULT

Your bank

They hold it. You ask permission.
  • They can freeze your account
  • They can set withdrawal limits
  • They can close your account
  • They can deny transactions
  • They can share your data
YOUR KEY

Your bitcoin

12 words. That's your key. You are the bank.
army
bright
castle
dawn
eagle
frost
garden
honor
island
jewel
karma
lunar
Write it down. Store it safe. Never share it. No company holds it for you.
Same money. Different rules.
You hold it. You control it.

Dollar. Gold. Bitcoin.

Three forms of money compared across seven properties. Bitcoin leads on nearly all of them except track record.

Property
Dollar
Gold
Bitcoin
Supply
Unlimited
~212K tonnes
21 million
Inflation
~2-3% / year
~1.7% / year
Halves every 4 yrs
Portability
Physical + digital
Heavy, slow to move
Send in minutes
Divisibility
2 decimals
Hard to split
8 decimals
Censorship
Can be frozen
Can be seized
Cannot be frozen
Availability
Banking hours
Dealer hours
24/7/365
Verifiable
Trust the bank
Requires assay
Verify in seconds
Track Record
~250 years
5,000+ years
17 years
Dollar
0
Gold
0
Bitcoin
0
Bitcoin leads on almost every property except time.
It's been around for 17 years. Gold has 5,000.

Now go deeper.

Those are the basics. Here's where to go next.

Built by 21VOX. Bitcoin education in plain English, with free tools for every level.