Officially Worn Out of Traveling for a While

I cleaned out my wallet after returning to Buenos Aires from Kabul via India and Germany.   What I found was money from SIX different countries: 

• United Arab Emirates Dirhams
• U.S. dollars
• Euros
• Indian Rupees
• Argentine Pesos
• Afghan Afghanis
• One lone Rwandan Franc

I am ready to live with just one currency.  Please.  At least for a few months.