How are these used? I'm new to collecting and so far I've just ziplog bagged my coin. I know it's bad. The only coins I've kept (which I found in circulation) are wheat pennys, 1923 silver dollar ( from a grandma), an Indian head and a couple
Buffalo nickels. We do have a $5 and $20 minted in hawaii. I'm curious to know which coins are kept preserved for value and which aren't. I'm still learning.