Probably not the most reliable path to job security, but definitely an interesting one: becoming one of the only people in the world who can play an obscure and very challenging instrument.

The Man to Call When You Need a Cimbalom. (A What?)
Chester Englander is a big name in a small world: he is playing the cimbalom, a jumbo hammered dulcimer that resembles an inside-out piano, in John Adams’s “Antony and Cleopatra” at the Met.
newyorker.com
