I had my wallet stolen in Amsterdam and had roughly $100 USD total remaining stashed in my luggage. If I recall, it was about evenly split between USD and Euro and was my $50 USD hidden stash and a some Euros that were randomly floating around outside my wallet. I flew the next morning to St Petersburg with my passport and essentially no money, debit cards or credit cards. This $100 was by no means enough to last me until my Western Union wire arrived. Things would have gone more smoothly if I had stayed in the EU, but Russia had its challenges and the time zone differences added a day. It was rough. My suggestion is to have at least $200-300 USD or Euro stashed away. I want to have enough for a short hop plane ticket and several days of food, hotel and ground transportation. I now carry more like $500 "spare." I also carry a separate stash of a couple of days worth of my medications and glasses. Money, spare glasses and meds... just in case...