Why?
Why would anyone want to do something that's been done... especially on TV?
What about ORIGINALITY?
What about creating material that is "yours" and not the same stuff all the other wannabes are doing?
Why not choose to stick out from the rest by doing your own thing and building up your own name?
Too many of us look at every magic Tv spot as they would a catalog in some store rather than the demonstration they are meant to be; an inspiration for you that allows you to see where you could end up IF you are original, creative, and different enough to catch the eye of booking agents, talent buyers and of course, the consumer.
If you go out and do this particular routine along with any dozen other tricks you've seen Criss, David or whomever else do on TV or YouTube you can get work as a filler act. As such you might see salaries of $300.00 to maybe $600.00 a gig. Alternatively, you could create your own act and do material that is not as common or "commercial" and as such, stand out from the rest of the pack. This allows you to become a brand name and your are hired based on what makes you different, not what makes you the same boring thing you see on any given street corner. Why you take on that mantel you will find yourself easily getting offers of well over $1,500.00 to as much as $5,000.00 and that's for working small private functions, not even corporate type gigs.
I know you were looking at the Halloween question, but even at that, we owe it to ourselves and our patrons to do "more" than what they've already seen. We need to impress them by being who we are, not who or what we can mimick.
Didn't this make anyone else laugh? This is like, a Jr HS kid who is in the art club asking someone, "hey, I want to create a nice piece for the exhibition at the end of the month, what kind of picture should I create?" and then someone replies, "hmm, you should try to do something like this person's work, because it suits you well, and I think it would be really good." THEN, someone like this poster says, "OMG!!! How can you ever expect to go PRO and get the BIG BUCKS by copying everyone else's work???? You gotta be original and only create some new things, so instead of getting like 600 dollars, you can get like 2000 dollars and make it big time!"
The problem with this is, you are skipping about a gazillion steps in between.
There is nothing wrong with trying to learn other people's material. Heck, I even bet you do an ACR. News flash, you didn't create that. True, eventually, you will want to branch off and start making things more original, or creating brand new things altogether, but, you can't skip the learning and adapting stages.
So, back to the OP, please forget what this person said for now and if you want to learn some material that you have seen performed, please go ahead and do so. Learn why those magicians have been successful performing those tricks and learn to make them your own eventually.