Just wanted to add my thoughts on the matter, maybe it'll be inspiring to you.
A coin flying straight up, that's a pretty cool thing, it can look very magical if done correctly, but please remember that after you've performed it, you have given away the fact your audience that you can make a coin leap, on your command. That gives you a great control over the coin and you could make it fly between your hands whenever you want to, in your spectators minds.
Now the funny part is, you actually can! The muscle pass is a great tool, and definitely worth to practice and develop, but then again, it's a great tool, and I don't think you should ever show that tool to your audience, the same way that you should never show them that you actually can classic palm a coin.
I remember Chris Kenner at some point during an interview say that Homer Liwags coin magic would always fool him because he would always forget that he can use muscle pass. Since he had never done the move as a trick before, only as a tool.
I guess this comes down to the philosophical question: Are the spectators really that simple-minded as we sometimes may think they are?
It's your job to interpret that question and make your own theories about it.