I was a rare coin dealer for a number of years. I have seen similar "keep this and you'll never be broke" lines, on many coin souvenir items. I doubt that it is tied to any particular group of people. If however the eagle on the back of your silver dollar is standing, with his wings folded, you may have a fairly valuable coin on your hands, depending on it's condition. If the eagles wings are spread open, it is a fairly common silver dollar, but even an average coin has a little value today. Gene Warner