I just got a similar pattern. The shop owner told me the story of a lady who had her purse stolen. She had put her passport and money in between the inner bag and the outer bag. The purse was recovered. Her billfold with charge cards were gone and the insides had been dumped. But they had not discovered her passport and money between the two parts of the interchangable bag. So you have your own secret hiding place.
Your fabrics are so fun. You should have a great time using it.