History.
People have pooled money together for more than 5000 years.
Today, savings clubs are used by communities all over the world. Some groups pay into a shared pool every week or month and give the total to one person at a time (rotation), and others keep building the pool for when someone needs it (accumulation).
There is a name for them in every language:
Adashe

Nigeria
Ajo

Nigeria
Arisan

Indonesia
Ayuto

Somalia
Chama

Kenya
Chilemba

Zambia
Chilemba

Zimbabwe
Chilemba

Uganda
Chiperegani

Malawi
Chit

India
Didlum

United Kingdom
Dijji

Ivory Coast
Djanggi

Cameroon
Esu

Bahamas
Hagbad

Somalia
Hamamei

Papua New Guinea
Ikelemba

DR Congo
Junta

Peru
Kongsi

Brunei
Menage

Scotland
Nájom

Benin
Ngwa

Cameroon
Njangi

Cameroon
Osassa

DR Congo
Paluwagan

Malaysia
Paluwagan

Singapore
Paluwagin/paluwagen

Philippines
Pandero

Peru
Pardna /er

Jamaica
Passanaku

Bolivia
Pooling club

South Africa
Safina mani

Ivory Coast
Stokvel

South Africa
Suit clubs

Australia
Sundaying

Papua New Guinea
Susu

Nigeria
Susu

Sierra Leone
Susu

The Gambia
Susu

Trinidad and Tobago
Tanda

Mexico
Tontine

Benin
Tontine

Malaysia
Tontine

Singapore
Tontine

Senegal
Tontine

France
Wari monai

Ivory Coast
Xitique

Mozambique
جمعية

Egypt
เล่นแชร์

Thailand
እቁብ

Ethiopia
會

China
會

Taiwan
頼母子講

Japan
계/契

Korea