I hear the word "illuminati" like many times a day, but in a different fashion.
My friends discuss that sometimes, the forum also is concerned about this topic as I can see, but there are many ways that you can call this "mysterious group" for example many people equalize them with a New World Order, Reptillians, or other fake conspiracy theories like that.

I really doubt that they exist, they would have to control literally every government, every single insitution and researching centres to prevent leaks to the crowds.
That kind of operation would require an incredible money to even plan this, making it true is a totally different thing.

That is only my opinion, and Im not going to talk about "what is the aim of illuminatis" if even nobody has proven that they exist.