A few weeks ago I stopped by the local cash machine to get some cash for an adventure. Being a guy who seems to collect odd stuff sometimes, this one stumps me just a bit. The cash machine hands over (10) 20 dollar bills from 2013 with consecutive serial numbers. 1st time ever for this to happen to me and it happened a couple more times during the next following month, same 2013 bills. The question is---do I just spend it or put it away unless I really need it?? What are the odds that something like this gets interesting to collectors many moons down the trail??