There are many people who are afraid to travel to some places because of some threats they can encounter. That is why countries can issue a travel ban to some countries if they knew that it is not safe. Sometimes they just issue a travel advisory if the danger is not imminent and in progress. Traveling to Europe has also its risks as you can encounter some robberies or theft. But this cases is not isolated in the country of France but to all countries.
That is why it is important to practice diligence in minding your belongings and practicing being safe. Thieves would target tourists that look wealthy and carries with them cash and belongings worthy to be sold. If you will go to the city of Paris and Nice then you must be very extra careful with thieves. They can be expert on the field already even if they are just in their teens. So make sure to not display valuable items that attract thieves. Do not leave important and valuables in your car.
If you do then leave them in the part that is locked like the compartment or in the trunk of your car. You should take care of your belongings. Your travel documents also should not be with you everywhere in the public display. Keep them safe from the sight of criminals so they would not put their interests in it. If you are traveling alone then make sure that you do not travel alone in the night time.