The crime rate in Egypt is fairly low. Most crimes are petty in nature -- such as pickpocketing or muggings. Several terrorist attacks have occured across Egypt in recent years. Be sure to avoid any protests and other demonstrations.  

As with any locale you are unfamiliar with, it pays to be alert while traveling within large crowds, especially during the high season and while traveling on crowded public transportation, such as minibuses. Pickpockets can quickly pick you clean of your money or passport, quickly turning a dream vacation into a nightmare. Make use of your hotel's safe to protect items such as any jewelry you might have brought with you (which, in reality, is best left at home), extra monies, credit cards, and passports. Keep your eyes and a hand on bags at all times, and do not leave your items unattended.

Keep a copy of the front page from your passport, any tickets, and any other important information in a location separate from the originals. You may also consider leaving a copy of these pages with someone back at home, whom you can contact if necessary if you get into trouble abroad. These copies will come in handy if you are a victim of theft.  

The latest travel information for Egypt can be found on the US Department of State Consular Information sheet for Egypt.