Disadvantages
Alternative currencies promoted as local currencies that cannot be spent abroad have limited use.
According to professor Nikolaus Läufer, the use of local currencies such as Freigeld can only increase economic activity temporarily. Lengthy use of a local currency will ultimately result in a decline in economic activity and lead to a destabilization of the economy. This is due to the increased circulation velocity of the money as the amount in circulation decreases (as currencies as Freigeld reduce in value rapidly).
Read more about this topic: Alternative Currencies