After gypsyheart's pictures I almost forgot what the topic was!?
Anyway, I've studied this hole thing from both the ancient and modern perspective.
Here's the info I gathered.
Coins were bored mainly for one of three MAIN reasons:
1) jewelry applications
2) sentimental reasons
3) superstition applications
The jewelry & sentimental applications are rather obvious.
The superstition application is not well known today. I learned it many years ago from a major coin dealer in the U.S.? I purchased 200 U.S. Large cents from him for $1 each. Back in the early 80's he was glad to get rid of them.
I asked him why so many coins from early America are holed. He told me they were "tinkers." The Native Americans bored holes in the "white man's" money and tied the coins about the neck, etc., so they would clack together and make a tinkling sound. This was thought to keep away evil spirits.
I know some will say "no way!."? But, I've researched this over the years and discovered that it is indeed fact. I don't have the documentation anymore but it can be had if one does some checking.
The ancients holed coins partly to show faithfulness to the emperor or whomever. They wore the coins about the neck or they had them connected to body leather straps.
It would take a book to explain it all.
In some ways I prefer holed coins now that I better understand them.