A professional psychic uses psychic abilities in his or her chosen profession. Almost all top professionals in any field have developed and use abilities that can be termed psychic in nature - though they rarely call themselves professional psychics.
Many people think that a professional psychic can only be in the business of guessing lottery numbers. Although that is not impossible, the amount of energy it requires from the professional psychic makes it not worth the effort. (Similar to as how physicists are able to transmute lead into gold - but they generally don't do it because it's not worth the energy investment.)
There are easier and more fulfilling ways for a professional psychic to make a lot of money, such as building businesses or trading the stock market.
Many professional psychics find it most fulfilling to share the fruits of their spiritual advancement with those who are hungry for such knowledge. Teaching can be a worthy life goal.
The most essential secret of the professional psychic is: "Do what you love and love what you do!"