That depends on how you define dangerous. Most traditional sports have some inherent risk. While injuries can occur in any sport, boxing does have a higher risk of head injuries that can have long-term consequences. Obviously, if someone is not practicing safety and taking appropriate precautions, then the risks are greater. There are precautions that can be taken to reduce the likelihood of injury, such as proper training and the use of appropriate protective gear. Ultimately, it depends on the individual and the precautions they take to make boxing safer.