Mexico’s tourist areas are pretty safe, and the resorts, especially the all-inclusive and luxurious ones, are probably one of the safest places to be at. Security is likely to be on duty 24/7, most of them include security boxes for your personal items, and resorts’ estates are guarded, so there’s nothing to worry about while you’re there. Of course, common sense precautions should be exercised (anywhere); don’t leave your stuff unattended, your phone forgotten on the breakfast table...As long as you’re careful, you'll be good!