I have no scientific evidence, blah blah blah, but financial crimes are tied to stuff. Art, cars, sportscards, and coins. Some guy or girl gets his or her hand caught in the cookie jar and all those hundreds, thousands, millions they pilfered are confiscated in their resulting form. Sometimes the theft occurs to buy cars, art and such.
Often there are some nice rare cards and i get all excited and want to bid, and then I realize that those cards are available on ebay every day.