I got in the habit of collecting a few $100 bills & stashing them in our home vault for when we travel. Been doing it long enough that we've got $15K at last count. Never had any trouble with them sticking together, but it's pretty humid out here. Probably should convert them to traveler's checks so there's some protection if we had a fire. Now that we've been retired for so long, everything goes on Amex, so my cash is "play money." 
