Other items like rare coins must be stored in safe deposit boxes. Years ago when numismatists where able to locate coins in circulation they were very inexpensive and could be stored at home for personal enjoyment. Today they are very expensive and people generally do not keep them at home. They are produced in large quantities generally and represent monetary value in terms of long distance time. They are produced by a large host of issuers and telephone companies.
People today collect cards many ways.
Some of our cards that were produced for say Chrysler would have to be included in any Chrysler collection can be very elusive. Another way would be to collect cards produced by major corporate sponsors like Coca-Cola. Coke memorabilia collectors love this new low cost collectible. Phone card collecting can be fun, educational and generally inexpensive, although there are several cards that are very rare and trade for hundreds of dollars. Over two million collectors worldwide own phone cards.