Is it okay to eat silver
This is a reasonably common practice in South Asian cuisine. Some reasonably credibly information can be found in the Wikipedia article on vark. Quoting from the section on safety:


  Gold and silver are approved food foils in the European Union, as E175 and E174 additives respectively. The independent European food-safety certification agency, TÜV Rheinland, has deemed gold leaf safe for consumption. Gold and silver leaf are also certified as kosher. These inert precious metal foils are neither considered as toxic to human beings nor to broader ecosystems


and


  The total silver metal intake per kilogram of sweets eaten, from vark, is less than one milligram.