You won't ever know until you try and fail miserably. Some of my best effects in my show are things I had messed up years ago in every way imaginable until I worked out every angle, bit of patter, etc. I had taken every negative and screw up and changed it into a positive so that now there is no way possible to mess it up.
Like Michael said, use everything that you are proficient at now but never stop working towards other miracles....otherwise you'll never grow as an artist. You "have" to get yourself out of the comfort zone.