Cash may not work in case of TEOTWAWKI. In all other cases it is nice to have. But, definitely, smaller is better! The best advice is to distribute the money over several pockets, wallets, shoes whatever. You are on a sudden budget. Use the money wise! I have been robbed. I have lost stuff. I have forgotten money , credit cards, wallet. What works for me is a moneybelt. You know these belts you can put in your jeans, but with a zipper on the inside. But then I have some other places to keep chance or bills.