Had a friend growing up very serious with them bought alot from the 20's and 30's Back in the early 70's. bet he still has them also. Only thing I collect are American Silver Eagles MS 70 only. They go up pretty fast each year as a coin value. Silver content about 10% a year.
I like the old ones also 30's 40's. In Florida I went to a card shop that had coins on one side of the shop. Cheryl and I sent some time looking at the old coins and currency pretty cool.