Fake Christmas trees are generally considered safe for cats, as they do not pose a choking hazard and are less likely to cause allergic reactions than real trees. However, it's still important to supervise your cat around the tree, especially if it has decorations or lights that could be chewed or pulled down. If your cat is prone to climbing or playing with objects, consider using a sturdy, stable tree that's less likely to tip over. Additionally, ensure that any ornaments or other decorations are securely attached and out of reach of your cat.