Sword canes are more appropriate as collectibles. They're also probably illegal to carry publically in most areas of the United States. They are also often poorly constructed.
You're better off carrying a solid, well-made walking cane constructed of a hardwood and using it as a blunt.
Becoming effective with blunt cane weapons takes less training to be effective than sword training.
Swords also have an inherent lethality, much like a handgun. The difference is you will be puncturing and cutting a human with an object in your hand. There will be resistance, impact, and blood. You will not pull a trigger and inflict damage. You will be taking a blade in your hand and slicing and stabbing an individual until they are no longer a threat to you. This kind of situation is even more personal than shooting someone.
You will probably be better off getting some cane weapons training, as well.
If you want to study a martial art that uses cane weapons, you can try finding an kali/escrima school. Also, several traditional Japanese martial arts such as Kukishin Ryu offer hanbo (cane) study. You can find this at Bujinkan schools or any number of koryu martial arts schools located here in the States.
