They are fun.

Coins are fun to collect and look at. Keep it that way and pass your wisedom on to kids so this wonderful hobby can keep going. You can even make donations to certain places. I know that when I grow older I will share my knowledge with the young kids to get them interested in coins. If there isn't a next generation behind you then the hobby will just die off and the hobby you used to love won't be there anymore. Teah the next generation so they can do the same.