1955 pennies are scarcely found in pocket change. They’re most often encountered in bank rolls, estates containing coin collections, and offered for sale by coin dealers.
While 1955 wheat pennies are rather difficult to find in spare change these days, there are still plenty of them around. It’s just that most of the survivors are sitting in coin collections and coin hoards.
It’s a good idea to save any 1955 pennies you find because, even though millions were made, they are still considered obsolete and may increase in value down the line.