Why would you want to fool copperfield(you can't)? In fact why would anyone who is serious about magic want to fool laymen? We should be entertaining them. If i know my spectators walk away from my performance feeling fooled, i would be damn pissed with myself.
Anyway to answer the threadstarter, if i have this great honor to perform for him, i'd do triumph or some of the great classics (i'm not a coin guy but if i have the know-how, 3fly) or something with a strong kicker ending PERFECTLY and of course with good presentation/ patter.
my 2 cents.