You know the TV show "Shark Tank"? where ambitious would-be entrepreneurs pitch their ideas to rich venture capitalists (the sharks) hoping to get them to invest in their idea. A few years ago there was a guy pitching a "high tech walking aid that could used for self defense while it the woods, etc. etc. etc. . One of the sharks sarcastically replied "Congratulations. You've invented the stick." I don't think he got any sharks to bite.