Thanks for answering. I believe it.

Even though songs with vocals generally trump instrumental tunes, with "Dueling Banjos" you have the advantage of (1) a very familiar and popular tune that (2) allows as much theatrical showing-off as you can muster, plus -- usually, although apparently not in your case -- (3) the extra volume and visibility of a duo or group rather than performing solo.

In fact, "DB" undoubtedly *is* one the most lucrative songs for busking. Generally available only to banjo players, unfortunately, although really skilled players might do a nice job with another instrument, or two other instruments. Harp and pennywhistle? Tuba and clarinet? Kazoo and washtub bass?