Cutlery made of sterling silver used to be a sign of wealth for a household. Using a silver spoon for soup can add a metallic flavour to the taste of the soup.
I have seen several different of these altered silver coin spoons through the years and they have mainly been used for adding sugar to beverages - tea or coffee.
For a different use I have also seen countless of different silver coins that were altered into brooches - a web search will reveal the diversity.
The finest coin brooches in my opinion are the ones where the surroundings of the portrait has been removed to make it look more like a brooch in nature, like shown in this image (borrowed from the internet):