What are satoshis (sats)?
One Bitcoin is divisible into 100,000,000 smaller units. Each one is called a satoshi, or "sat" for short, named after Bitcoin's pseudonymous creator, Satoshi Nakamoto.
Why satoshis matter
With Bitcoin trading in the tens of thousands of dollars, buying a "whole Bitcoin" is out of reach for most people. But nobody needs to buy a whole Bitcoin. You can own 10,000 sats, or 50,000 sats, and it's fully functional, spendable, transferable, and growing (or declining) in value just like any other portion of Bitcoin.
Thinking in satoshis makes the math more intuitive. Instead of "I have 0.00023450 BTC," you have "23,450 sats." When your Astra payroll contribution buys Bitcoin every week, you're stacking sats, a little at a time, automatically.
Quick reference
| Sats | BTC equivalent |
|---|---|
| 1 sat | 0.00000001 BTC |
| 1,000 sats | 0.00001 BTC |
| 100,000 sats | 0.001 BTC |
| 1,000,000 sats | 0.01 BTC |
| 100,000,000 sats | 1 BTC |
"Stacking sats"
In Bitcoin culture, accumulating small amounts of Bitcoin regularly is called "stacking sats." The idea is that consistency matters more than the dollar amount. Every week your Astra contribution runs, you're adding sats to your stack, automatically, without thinking about it.
Small amounts add up. $50 per paycheck, every two weeks, is $1,300 a year in Bitcoin, regardless of price.