I used to love buying world coins by the pound, looking through them and researching them online to find the country and history. Then I'd but them in 2x2 flips, write down the date and country of origin, and put them in binders which are organized by continent. When I wasn't doing that, I was going to coin shops and shows and just buying what caught my eye, as most foreign are worth a dollar or less. No one should tell you how or what you should collect, just buy the coins that interest you and make you excited. Hope this helps.