WHO IS THE BEST CHESS PLAYER IN THE WORLD??

What do you mean?

If a 5 year old had achieved your present rating it would mark them as a promising player.

You need to be a GM by 15 if you expect to be high in the world rankings as an adult.  As for becoming World Champion. Look at Carlsen's strength as a child (and Radjabov and Karjakin who were similarly rated at similar ages, but were eventually outpaced by Magnus).  Look at Firouzja's rating progress from age 8 to the present on the FIDE rating site?  How does yours compare?  And Kasparov was already stronger than most good club players by the age of 9.  Does your progress compare with that?

I believe that players that start to take chess seriously in their teens or as young adults can become very strong ... but world champions?  It is delusional for most players to think that is a realistic possibility.

Of course I know that you were joking.