Not everything you practice should be something that you're going to perform for your audience
I practice the coin roll a lot (more than 60 spins a minute yo) and I never show it to people
Maybe you should show it to The Guinness Book of World Records people... the last I heard was that the 2007 record was 51/min (but the guy claims a personal best of 57/min; you can read about it here
). You could totally demolish this guy ^_^
P.S. Why don't you use your coin roll within your routines? I do and I know many professionals use it, too -- not only do spectators appreciate it, but it also provides an excellent source of misdirection.