In Parshat VaEra, we see Moshe and Aharon begin to perform miracles and bring plagues onto the Egyptians. It seems that magic was not uncommon to the Egyptians.  For every miracle performed by Moshe and Aharon, the Egyptian Magiciansattempted to debunk the miracle by doing the same "feat".

The first and most famous incident was when Aharon cast down his staff and it turned into a serpent (some say alligator).  The magicians did the same, only to have Aharon's staff swallow theirs. While the staffs of the magicians had the illusion of a serpent, Aharon's serpent was real and possessed the ability to destroy any threats.

The business world, whether selling a product or service, is replete with competition. When you're the first and the best, you'll be faced with skeptics, naysayers, and even copycats. Some may say that you're not for real and cannot succeed. Some may say that your product isn't worthwhile. Others will try to mimic your product and take part or all of your market.

What's a business to do? Stay the course. Prove that your product is real and viable. Continue to develop and perform, and outperform any competition. Eventually, the copycats will not be able to do what you do, and you'll show everyone that their product is an illusion, but you've got the real thing.