Just a thought, those knives are getting fairly rare and happen to be pretty sought after on the market. Especially one with a story like yours (hopefully it can be verified). Keep in mind though that anything you do to an antique other than mild cleaning and conservation will greatly reduce its value. That also goes for sharpening.

Of course, it's your bolo and should you prefer to use it as a working tool it's your choice. But it does sound like a nice piece of history that may deserve its retirement after a long time of good service.