One thing you end up with a lot of is left over currency. No matter how hard I try to withdraw just the right amount, I usually have some left over. A while ago I finally gave up and just started collecting it. Now I have money from nearly every country I have visited. In a way it’s kind of cool. In some countries I am a millionaire. In others, the reality is more sobering. At least I end up with colorful wads of useless paper.