In this documentary of 2013 We can see how local needs different social currencies have emerged to meet the needs of its users, Since many have services or goods that you want to sell, and we need to acquire other than.
Katika documentary huu wa 2013 Tunaweza kuona jinsi mitaa mahitaji tofauti ya kijamii sarafu imeibuka ili kukidhi mahitaji ya watumiaji wake, Tangu wengi na huduma au bidhaa unayotaka kuuza, na tunahitaji kupata nyingine zaidi.