To make a clon of bitcoin and sell it? What should I do?
What is a clon? Clon
e? Clo
wn ?
You can just fork bitcoin, or copy the code, create a token in another chain that you call "bitcoin".
But did you think people around here are so stupid that they are waiting a fake bitcoin

?
You should no nothing. Save your energy for study and not for scam other people.
I think what he want to say is cloning or having a fork using bitcoin. That is already an intensive research and studies about bitcoin. I could never help him because I am not a technical expert but I know some of it. Maybe, this OP just want to know about the fork and he don't have plan to scam. But I think, if the OP has good intentions he should get some crypto adviser.