Oh and the "if i was a psychic i would be rich" argument to disprove the possibility...
L O L
What if the famous investor Warren Buffet is one of them ??? Would it be smart if he revealed his secret to everyone ? He may think that if he can do it, then with some incentive (earning billions for example), at least few of the 7 billions people would become a big competition...
If he is a psychic, he will want to be the only one.
And if you win a lottery, because you can read the future... you will want to keep it a secret and repeat it, not to announce to all casinos and lotteries that you are the biggest danger to their business and that they need to ban you and check every next winner for any possible connections with you...