Because the Vegvisir is a non-religious symbol representing positive concepts such as guidance, protection and finding one’s way, there doesn’t appear to be a reason not to wear it. However, it was also believed to be a magical amulet and some Christians prefer to avoid such symbols. This comes down to your beliefs and the rules of your church. If you feel uncomfortable about wearing it, there are other symbols like the compass or the anchor that have similar meanings with no connection to magic or superstition.