Bitcoin for Savers Together

Saving together: chamas and group savings with Bitsacco

Chamas already know how to save together. Learn what changes when a group saves in sats, and the rules to agree on before the first contribution.

15 minBeginner7 / 8

Draft: this lesson is still waiting for review.

What you'll learn

Describe how a chama keeps money and records today
Compare ways a group can hold bitcoin: one treasurer, multisig or a federation
Write the rules a Bitcoin chama should agree on before it starts

Key terms

chama: A group of people who save or invest together under rules they agreed on.
multisig: A setup where several signatures are needed to spend bitcoin, for example 2 of 3.
federation (shirikisho): A group of guardians who hold bitcoin together; most of them must agree before money moves.
volatility (kupanda na kushuka kwa bei): How quickly and how far a price moves, up or down.

Every month, the twelve women of the Tumaini chama meet, contribute 1,000 shillings each and hand the pot to one member. The treasurer keeps a book; the secretary writes the minutes. It works because they know each other, and because the rules are clear.

What a chama already does well

Chamas come in many forms: merry-go-rounds, table banking, investment groups. The best ones share three habits:

Clear rules, agreed before the first shilling.
Records that every member can check.
Shared control, so no single official can disappear with the money.

Bitcoin doesn't replace these habits. It gives them new tools.

Saving as a group in sats

A group can agree to save in sats instead of, or as well as, shillings. Two big questions come first.

Who holds the keys?

Option	How it works	Watch out for
One treasurer	One wallet, one seed phrase	One person can lose or take everything
multisig	For example 2 of 3 officials must sign every withdrawal	Officials must keep their own seed phrases safe
A federation	Trusted guardians hold the group's bitcoin together	Choose guardians the members trust

What do we count in? Because of volatility, 1,000 shillings of sats this month may be worth 800 or 1,200 next month. Decide in advance whether each member owes a fixed amount of shillings or a fixed amount of sats, and what happens when a member leaves after the price has moved.

Bitsacco is built for this kind of saving, for individuals and for chamas. Check bitsacco.com for what it offers today.

Questions your constitution should answer

How much does each member contribute, how often, and in shillings or sats?
Who holds the keys, and how many signatures does a withdrawal need?
How do members see the group's balance and history?
What happens if a member wants to leave, or stops contributing?
What happens if an official loses their phone or seed phrase?

Try it

With your chama, or with two friends, draft answers to the five questions above in under 30 minutes. Keep the draft; you'll be surprised how much it helps.

Reflect

Write your answer down, or talk it over with a friend or your chama.

In your chama, who could lose the group's money today, and how would you find out?
Should your chama record contributions in shillings or in sats? Why?