People claiming that they can make lots of money by using the jinn - Belief in the Jinn, witchcraft and the evil eye -

There is a man who claims that he deals withthe jinn, and that he is
prepared to pay huge profits to anyone who deals with him. For
example, if I give him one million, he will use mercury to deal with
thejinn, and then he will give me a profit of approximately five
million riyaals. What is your opinion of this man's claims? Is it true
that the jinn can bring money to a person who – as he claims – uses
them?
Praise be to Allaah.
In my opinion this is not permissible, because dealing with them
usually only comes after getting close to them by means of things that
they like. This is the action of the practitioner of witchcraft who
gets close to the Shaytaan by doing things that he likes, which
cancels out all his good deeds. Whenhe mentioned that he uses mercury,
this is deceit and taking people's money under false pretences, and it
may come under the heading of gambling and stealing. The shayaateen
work by illusions and magic, and it is known that they do not possess
any kind of money or currency or goods. If they give anything of that
sort to aperson, either it is an illusion that is not real, or else it
is something that has been stolen from other people. It is not right
to deal with them at all.
In fact, many of these fraudsters who claim that they can make money
are cheats and liars who deceive the people and destroy theirwealth
and efforts; it is no more than theft. The newspapers are full of
stories like this. We ask Allaah to keep us safe and sound.