If you wind up traveling enough, eventually you'll acquire a small collection of luggage. Big 26" rollaways for the extended trip, 21" carry-ons for the quick weekend in LA or NY. You may even have a largish backpack for those occasions when you'll need one.
I dug out said backpack today. Opened it up. Look at what I found inside...
Waaah! Forgotten-about money! In big denominations!
Looks impressive! 236,000...erm, dong??
Yup, I found US$15.00 in my backpack. Whee. Now how come I can't find any forgotten about Euro in my luggage??